TY  - RPRT
TI  - Carboniferous megafaunal and microfaunal zonation in the northern Cordillera of the United States
AU  - W.J. Sando
AU  - B. L. Mamet
AU  - J.T. Dutro
PY  - 1969
DO  - 10.3133/pp613e
UR  - https://pubs.usgs.gov/publication/pp613E
ID  - pp613E
ER  -