O. Wilford Olsen, ?Research Notes: Sucking lice (Anoplura) on marmots?, Journal of Parasitology, vol. 24, no. 3, p. 281, 1938.

O. Wilford Olsen, ?Parasite studies on ring-necked pheasants, Phasianus colchicus torquatus (GMELIN) in Minnesota.?, Journal of Parasitology, vol. 24, no. Suppl. 24, pp. 1 - 53, 1938.

H. Ellsworth Ewing, ?The sucking lice of American monkeys?, Journal of Parasitology, vol. 24, pp. 13 - 33, 1938.