Part I
. A history of the gannet's colonies, and the census in 1939. J. Anim. Ecol. 12:173-213.
Fisher, J., and H. G. Vevers. 1944. The breeding distribution, history and population of the North Atlantic gannet _(Sula bassana)_.
Conservation of marine birds of northern North America:: papers from the international symposium held at the Seattle Hyatt House
. A history of the gannet's colonies, and the census in 1939. J. Anim. Ecol. 12:173-213.
Fisher, J., and H. G. Vevers. 1944. The breeding distribution, history and population of the North Atlantic gannet _(Sula bassana)_.