TY  - BOOK
AU  - Hapgood,Fred
TI  - Why males exist: an inquiry into the evolution of sex 
SN  - 0688035469
AV  - QL761 .H36
PY  - 1979///
CY  - New York
PB  - Morrow
KW  - Sexual behavior in animals
KW  - Males
KW  - Reproduction
KW  - Evolution
N1  - Includes index; Bibliography: p. [189]-199
ER  -