TY  - RPRT
TI  - Reproductive activity of male Crotalus atrox and C. scutulatus (Reptilia: Viperidae) in northeastern Chihuahua, Mexico
AU  - J.S. Jacob
AU  - S.R. Williams
AU  - R.P. Reynolds
PY  - 1987
UR  - https://pubs.usgs.gov/publication/5223753
ID  - 5223753
ER  -