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	1.	South African Red Data book : Aves / W. R. Siegfried; P. G. H. Frost; J. Cooper; A. C. Kemp by Siegfried, Walter Roy, Prof Frost, P.G.H.Cooper, J.Kemp, A.C Series: South African National Scientific Programmes Report ; No. 7 Material type: Text Language: English Publication details: Pretoria : CS I R, 1976 Availability: Items available for reference: Namibia Scientific Society Library: Not for loan (1). Found in Open Library: Add to cart (remove)
	2.	No cover image available No cover image available Egg temperature and incubation behaviour of the ostrich / W. R. Siegfried; P. G. H. Frost by Siegfried, Walter Roy, Prof Frost, P.G.H Series: Madoqua, Ser. 1, No. 8, 1974; p. 63 - 66 Material type: Text Language: English Publication details: Windhoek : Nature Conservation and Tourism Branch of the South West Africa Administration, 1974, : John Meinert Printing Availability: Items available for reference: Namibia Scientific Society Library: Not for loan (1). Add to cart (remove)
	3.	No cover image available No cover image available Breeding adaptions of the Damara tern Sterna balaenarum / P. G. H. Frost; Gwen Shaughnessy by Frost, P. G. H Shaughnessy, Gwen Series: Madoqua, Vol. 9, No. 3, 1976; p. 33 - 39 Material type: Text Language: English Publication details: Windhoek : Nature Conservation and Tourism Branch of the South West Africa Administration, 1976, : John Meinert Printing Availability: Items available for reference: Namibia Scientific Society Library: Not for loan (1). Add to cart (remove)
	4.	No cover image available No cover image available Behavioural adaptions of the jackass penguin to a hot, arid environment / P. G. H. Frost; W. R. Siegfried by Frost, P. G. H Siegfried, Walter Roy , Prof Series: Symposium on the adaptions of birds for life in a hot and dry climate, Organised by the South African Ornithological Society and S.W.A. Scientific Society ; p. 1 - 2 Material type: Text Language: English Publication details: Windhoek, 1973 Availability: Items available for reference: Namibia Scientific Society Library: Not for loan (1). Add to cart (remove)
	5.	No cover image available No cover image available Egg temperature and incubation behaviour of the ostrich / W. R. Siegfried; P. G. H. Frost by Siegfried, Walter Roy, Prof Frost, P.G.H Series: Symposium on the adaptions of birds for life in a hot and dry climate, Organised by the South African Ornithological Society and S.W.A. Scientific Society; p. 12 Material type: Text Language: English Publication details: Windhoek, 1973 Availability: Items available for reference: Namibia Scientific Society Library: Not for loan (1). Add to cart (remove)
	6.	No cover image available No cover image available A new census method for penguins tested on Jackass Penguins Spheniscus demersus / R. M. Randall; B. M. Randall; J. Cooper; P. G. H. Frost by Randall, R. M Randall, B.M.Cooper, J.Frost, P.G.H Series: The Ostrich. p. 211-215 graphs; tables ; Vol.57 No.4 Material type: Text Language: English Publication details: Pietermaritzburg : Natal Witness, 1986 Availability: Items available for reference: Namibia Scientific Society Library: Not for loan (1). Add to cart (remove)
	7.	No cover image available No cover image available The response of jackass penguins to killer whale vocalisations / P. G. H. Frost; P. D. Shaughnessy; A. Semmelink; M. Sketch; W. R. Siegfried by Frost, P. G. H Shaughnessy, P.D.Semmelink, A.Sketch, M.Siegfried, Walter Roy , Prof Series: South African Journal of Science. p. 157-158 tables ; Vol.71 No.5 Material type: Text Language: English Publication details: Johannesburg : Durand & Bowden, 1975 Availability: Items available for reference: Namibia Scientific Society Library: Not for loan (1). Add to cart (remove)
	8.	No cover image available No cover image available Social behaviour of jackass penguins at sea / Walter Roy Siegfried; P. G. H. Frost; John Kinahan; J. Cooper by Siegfried, Walter Roy, Prof Frost, P.G.H.Kinahan, John , Dr.Cooper, J Series: Zoologica Africana: Volume 10, Number 1; p. 87 - 100 Material type: Text Language: English Publication details: Cape Town : A. A. Balkema; Zoological Society of Southern Africa, 1975, : Pioneer Press Availability: Items available for reference: Namibia Scientific Society Library: Not for loan (1). Add to cart (remove)
	9.	No cover image available No cover image available Plumage and ecology of cormorants / Walter Roy Siegfried; P. G. H. Frost; John Kinahan; A. J. Williams by Siegfried, Walter Roy, Prof Frost, P.G.H.Kinahan, John , Dr.Williams, A.J Series: Zoologica Africana: Volume 10, Number 2; p. 183 - 192 Material type: Text Language: English Publication details: Cape Town : A. A. Balkema; Zoological Society of Southern Africa, 1975, : Pioneer Press Availability: Items available for reference: Namibia Scientific Society Library: Not for loan (1). Add to cart (remove)