A short description of the sequence of plumages in some Palearctic surface-feeding ducks 01 June 1922 Comments ... Read More
Observations on the breeding-habits of the Merlin. 1 - General environment 01 June 1922 Comments ... Read More
On incubation. An observational and experimental proof of the value of the ovitegous habit in birds. 01 May 1916 Comments ... Read More