TY  - BOOK
AU  - Errington,Paul L., x
AU  - x
TI  - Muskrat populatins: x
SN  - x
U1  - 591/ERM 
PY  - 1963///
CY  - x
PB  - A contribution of the Iowa State Univ.Press
KW  - Zoology
N1  - x
ER  -