In search of mermaids : the Manatees of Guiana
Bertram, G. C. L. (George Colin Lawder) |
Bertram, G. C. L. (George Colin Lawder)
Antarctica, Cambridge, conservation and population : a biologist's story
1987
Bertram, G. C. L. (George Colin Lawder) |
Conservation of Sirenia : current status and perspectives for action
1974
Bertram, G. C. L. (George Colin Lawder) |