Verlag: Washington. Government Printing Office. 1941, 1941
Anbieter: J. Patrick McGahern Books Inc. (ABAC), Ottawa, ON, Kanada
Soft cover. 24cm, ix,254p., 16 figures, index, uncut and unopened, grey printed wraps, fine (sgc). Robert Ridgway (1850-1929) was curator of birds at the United States National Museum and devised the Ridgway colour system of bird identification. He completed the first 8 volumes of this series, 1901-19.