Erard Christian. König, C. & Weickck, F. — Owls of the world. Christopher Helm, A& C Black Publishers Ltd, London. 2008. In: Revue d'Écologie (La Terre et La Vie), tome 64, n°3, 2009. p. 290
Erard Christian. Brewer, D. — Wrens, dippers and thrashers. Helm identification guides. Christopher ...
Erard Christian. Message, S. & Taylor, D. — Waders of Europe, Asia and North America. Christopher He...
Bourlière François. King, C. — The Natural History of Weasels and Stoats. Christopher Helm, London, ...
Erard Christian. Kiwan, G. M., Boyla, K., Castastastell, P., Demirci, B., Özen, M., Welch, H. & Marl...
Erard Christian. Clement, P. & Hathway, R. — Thrushes. Helm Identification Guides. Christopher Helm,...
Erard Christian. Brown, R., Ferguson, J., Lawrence, M. & Lees, D. — Tracks and signs of the birds of...
Erard Christian. Dickinson, E.C. (ed.). — The Howard and Moore complete checklist of the birds of th...
Erard Christian. Gill, F. & Wright, M. — Birds of the world. Recommended English names. Christopher ...
Erard Christian. Dietz, C., Helversen, O. von & Nill, D. — Bats of Britain, Europe & Northwest Afric...
Erard Christian. Fry, C. H., Keith, S. & Urban, E. K. (eds). — The birds of Africa. Volume VII. Spar...
Erard Christian. Borrow, N. & Demey, R. — Birds of western Africa. Helm Identification Guides. Chris...
Erard Christian. Ferguson-Lees, J. & Christie, D. A. — Raptors of the world. A field guide. Christop...
Erard Christian. Turner, A. — The Barn Swallow. T & A D Poyser, Christopher Helm, A & C Black Publis...
Erard Christian. Latta, S., Rimmer, C., Keith, A., Wiley, J., Raffaele, H., Mcfarland, K. & Fernande...
Erard Christian. Clarke, T. - Birds of the Atlantic Islands. Canary Islands, Madeira, Azores, Cape V...
Erard Christian. Brewer, D. — Wrens, dippers and thrashers. Helm identification guides. Christopher ...
Erard Christian. Message, S. & Taylor, D. — Waders of Europe, Asia and North America. Christopher He...
Bourlière François. King, C. — The Natural History of Weasels and Stoats. Christopher Helm, London, ...
Erard Christian. Kiwan, G. M., Boyla, K., Castastastell, P., Demirci, B., Özen, M., Welch, H. & Marl...
Erard Christian. Clement, P. & Hathway, R. — Thrushes. Helm Identification Guides. Christopher Helm,...
Erard Christian. Brown, R., Ferguson, J., Lawrence, M. & Lees, D. — Tracks and signs of the birds of...
Erard Christian. Dickinson, E.C. (ed.). — The Howard and Moore complete checklist of the birds of th...
Erard Christian. Gill, F. & Wright, M. — Birds of the world. Recommended English names. Christopher ...
Erard Christian. Dietz, C., Helversen, O. von & Nill, D. — Bats of Britain, Europe & Northwest Afric...
Erard Christian. Fry, C. H., Keith, S. & Urban, E. K. (eds). — The birds of Africa. Volume VII. Spar...
Erard Christian. Borrow, N. & Demey, R. — Birds of western Africa. Helm Identification Guides. Chris...
Erard Christian. Ferguson-Lees, J. & Christie, D. A. — Raptors of the world. A field guide. Christop...
Erard Christian. Turner, A. — The Barn Swallow. T & A D Poyser, Christopher Helm, A & C Black Publis...
Erard Christian. Latta, S., Rimmer, C., Keith, A., Wiley, J., Raffaele, H., Mcfarland, K. & Fernande...
Erard Christian. Clarke, T. - Birds of the Atlantic Islands. Canary Islands, Madeira, Azores, Cape V...
Erard Christian. Brewer, D. — Wrens, dippers and thrashers. Helm identification guides. Christopher ...
Erard Christian. Message, S. & Taylor, D. — Waders of Europe, Asia and North America. Christopher He...
Bourlière François. King, C. — The Natural History of Weasels and Stoats. Christopher Helm, London, ...