APA

Gibbs H. L. G. P. R., . (1987). Adult survivorship in Darwin's ground finch (Geospiza) populations in a variable environment. : .

Chicago

Gibbs H L Grant P R, . 1987. Adult survivorship in Darwin's ground finch (Geospiza) populations in a variable environment. : .

Harvard

Gibbs H. L. G. P. R., . (1987). Adult survivorship in Darwin's ground finch (Geospiza) populations in a variable environment. : .

MLA

Gibbs H L Grant P R, . Adult survivorship in Darwin's ground finch (Geospiza) populations in a variable environment. : . 1987.