TY  - RPRT
TI  - Variation in the plastral formulae of selected turtles with comments on taxonomic utility
AU  - J.E. Lovich
AU  - C.H. Ernst
PY  - 1989
DO  - 10.2307/1445426
UR  - https://pubs.usgs.gov/publication/1007436
ID  - 1007436
ER  -