Editore: Bird Study, 1957
Da: Darkleaf Books, Arrington, VA, U.S.A.
Paperback. Condizione: Very Good. Stapled paperback in very good condition. Reprinted from Bird Study Vol. 5, No. 1, pp. 22-33. The effects of drainage and of the exploitation of bogs for fuel upon the distribution of geese are discussed. The investigation covers the years 1946-56. Maps.