Erard Christian. Ferguson-Lees, J. & Christie, D. A. — Raptors of the world. A field guide. Christopher Helm, an imprint of A & C Black Publishers Ltd, London. 2005. In: Revue d'Écologie (La Terre et La Vie), tome 61, n°2, 2006. pp. 204-205
Erard Christian. Sinclair, A. R. E., Fryxell, J. M. & Caughley, G. — Wildlife ecology, conservation,...
Erard Christian. Jones, H. L. — Birds of Belize. Helm Field Guides. Christopher Helm, A & C Black Pu...
Erard Christian. Zimmerman, D.A., Turner, D.A. & Pearson, D.J. — Birds of Kenya & Northern Tanzania....
Erard Chr. Ferguson-Lees, J. & Christie, D.A. (texte), Franklin, K., Mead, D. & Burton, P. (illustra...
This volume, 20 years in the making, was primarily intended as a field guide and starts with a compr...
Erard Christian. Brown, R., Ferguson, J., Lawrence, M. & Lees, D. — Tracks and signs of the birds of...
Erard Christian. Borrow, N. & Demey, R. — Birds of western Africa. Helm Identification Guides. Chris...
Erard Chr. Olsen, K. M. & Larsson, H. — Gulls of Europe, Asia and North America. Helm field guides. ...
Erard Chr. Raff Aele, H., Wiley, J., Garrido, O., Keith, A. & Raffaele, J. — Birds of the West Indie...
Érard Chr. Clark, W. S. & Schmitt, N. J.— Raptors of Mexico and Central America. Princeton Universit...
Erard Chr. Borrow, N. & Demey, R. — Birds of western Africa. Helm Identification Guides. Christopher...
Erard Christian. Jaramillo, A. & Burke, P. — New World Blackbirds. The Icterids. Helm Identification...
Erard Christian. Latta, S., Rimmer, C., Keith, A., Wiley, J., Raffaele, H., Mcfarland, K. & Fernande...
Bourlière François. Peterson, R.T. ; Mountfort, G. ; Hollom, F.A.D.. — A field-guide to the Birds of...
Erard Christian. Sibley, D. — Field guide to the birds of eastern North America. Christopher Helm, A...
Erard Christian. Sinclair, A. R. E., Fryxell, J. M. & Caughley, G. — Wildlife ecology, conservation,...
Erard Christian. Jones, H. L. — Birds of Belize. Helm Field Guides. Christopher Helm, A & C Black Pu...
Erard Christian. Zimmerman, D.A., Turner, D.A. & Pearson, D.J. — Birds of Kenya & Northern Tanzania....
Erard Chr. Ferguson-Lees, J. & Christie, D.A. (texte), Franklin, K., Mead, D. & Burton, P. (illustra...
This volume, 20 years in the making, was primarily intended as a field guide and starts with a compr...
Erard Christian. Brown, R., Ferguson, J., Lawrence, M. & Lees, D. — Tracks and signs of the birds of...
Erard Christian. Borrow, N. & Demey, R. — Birds of western Africa. Helm Identification Guides. Chris...
Erard Chr. Olsen, K. M. & Larsson, H. — Gulls of Europe, Asia and North America. Helm field guides. ...
Erard Chr. Raff Aele, H., Wiley, J., Garrido, O., Keith, A. & Raffaele, J. — Birds of the West Indie...
Érard Chr. Clark, W. S. & Schmitt, N. J.— Raptors of Mexico and Central America. Princeton Universit...
Erard Chr. Borrow, N. & Demey, R. — Birds of western Africa. Helm Identification Guides. Christopher...
Erard Christian. Jaramillo, A. & Burke, P. — New World Blackbirds. The Icterids. Helm Identification...
Erard Christian. Latta, S., Rimmer, C., Keith, A., Wiley, J., Raffaele, H., Mcfarland, K. & Fernande...
Bourlière François. Peterson, R.T. ; Mountfort, G. ; Hollom, F.A.D.. — A field-guide to the Birds of...
Erard Christian. Sibley, D. — Field guide to the birds of eastern North America. Christopher Helm, A...
Erard Christian. Sinclair, A. R. E., Fryxell, J. M. & Caughley, G. — Wildlife ecology, conservation,...
Erard Christian. Jones, H. L. — Birds of Belize. Helm Field Guides. Christopher Helm, A & C Black Pu...
Erard Christian. Zimmerman, D.A., Turner, D.A. & Pearson, D.J. — Birds of Kenya & Northern Tanzania....