By Schaller, George B., George B. Schaller
By Fitter, R. S. R.
By Muus, Bent J.
By Boyd, Alastair
By Jongh, Brian De
By Pizzy, G., Doyle, Roy
By Newby, Eric
By Burton, Anthony
By Bedford, Bruce L.
By Goddard, John
By John Reader, Harvey Croze
By Roth, Gunter D.
By Fitter, R. S. R., Fitter, Alastair H.
By Fitter. Richard and Fitter. Alastair.
By Attenborough, Sir David
By Harris, Keith, Buczacki, Stefan T.
By David Attenborough
By William Searle, Gerard J. Morel, Wolfgang Hartwig
By King, Ben F., Dickinson, Edward C., Woodcock, Martin W.
By Harris, Michael, Mackay, Barry Kent
By Brian, Michael V.
By Andrews, Michael
By Butler, C. G.
By Sorrell, Charles, Sandstrom, George
By Woodcock, Martin, Heinzel, HERMANN
By Kelly, Chloe Talbot
By Bruce Pearson, Pearson, Bruce
By Herman Heinzel, Richard Fitter, John Parslow, Herman Heinzel
By Mayr, Helmut