Washington, D.C. Carnegie Institution of Washington, 1947.
Softcover. First edition. Small quarto. 306pp. Illustrated with charts, graphs, and from black and white photographs of birds. Printed wrappers. Ownership stamp and signature of a noted American psychologist on the first leaf. Wrapers toned at the edges and with a bit of light creasing, hinges neatly reinforced with linen tape (possibly bound that way), very good or better. Carnegie Institution of Washington publication 572.