TY  - BOOK
AU  - Fries,Carl
AU  - Hibbard,W.
AU  - Dunkle,David E.
TI  - Early cenozoic vertebrates in the red conglomerate at Guanajato, México
T2  - Smithsonian Miscellaneous Colections ; 
PY  - 1955///
CY  - Washington, D.C : 
PB  - Smithsonian Institution, 
ER  -