Research
The preservation of wild animals for sport.
Blank, T.H. 1972. British Veterinary Journal, 128: 381-395.
Changes in organochlorine contamination of the marine environment of eastern Britain monitored by Shag eggs.
Coulson, J.C., Deans, I.R., Potts, G.R., Robinson, J., & Crabtree, A.N. 1972. Nature, 236: 454-456.