TY  - JA
AU  - Givnish,T.J.
TI  - Ecological constraints on the evolution of breeding systems in seed plants:  dioecy and dispersal in gymnosperms
SN  - 0014-3820
U1  - 82-711650 
PY  - 1980///
KW  - Conifers and other gymnosperms general
KW  - Plant ecology
KW  - Plant genetics and breeding
KW  - NOT IN AGROVOC
KW  - Seeds
N1  - ill. Bibliography p. 970-972
T2  - Evolution (USA). (Sep 1980). v. 34(5) p. 959-972
ER  -