TY  - BOOK
AU  - MacCallum,G.A.
TI  - Four New Species of Trematode Worms of the Subfamily Onchocotylinae
PY  - 1931///
CY  - Washington : 
PB  - Smithsonian Institution, 
N1  - From the Proceedings of the United States National Museum. Vol. 79, Art. 26
ER  -