Notebooks and pamphlets, 1917-1969 , regarding birds in China by Axel M. Hemmingsen; also other subjects by Dr. Ernest Hartert (in German); also "Migration Notes" by Wilder, 1917-1969

Includes notebooks, pamphlets, field notes, and other material on ornithology, mostly in China; Birds of Northeastern China by Wilder and Hugh Hubbard; correspondence of Wilder and his sons Theodore Wilder and Durand Wilder (George Durand Wilder, Jr.) and of Gertrude Stanley Wilder; volume of "Random Jottings" by Gertrude Wilder, including recollections of China missions and missionaries.