Watola G., Allan J.R., Feare C. J. 1996. Problems and management of naturalised introduced Canada geese Branta canadensis in Britain. In The introduction and naturalisation of birds. London, UK : [s.n.]. 136 pp.
Watola G., Allan J.R., Feare C. J. 1996. Problems and management of naturalised introduced Canada geese Branta canadensis in Britain. In The introduction and naturalisation of birds. London, UK : [s.n.]. 136 pp.