Processes of organic evolution
Stebbins, G. Ledyard(George Ledyard),1906-2000.
Englewood Cliffs [Hemel Hempstead] Prentice-Hall
1971
Pbk. £2.00. sbn 13-723387-6
Previous ed., Englewood Cliffs: Prentice-Hall, 1966
bibl p185-186
Evolution.