TY  - GEN
AU  - COTTER, Anthony Charles, 1879-
TI  - Natural species, an essay in definition and classification. iv, 274 p. ; 21 cm
AV  - QH 83  .C65
PY  - 1947///
CY  - weston
PB  - Weston college press
KW  - Species, Origin of
KW  - Natural history--Classification
N1  - Bibliography: p. 260-263
ER  -