Aard en oorsprong van bipedalisme by primate

by P. A. J. Ryke
Published 1987-03-01

Learning and memory

by P. A. J. Ryke
Published 1989-03-01

Terme wat verband hou met spesievorming

by P. A. J. Ryke
Published 1985-03-01

Biologie se uniekheid as substraat vir die tipies menslike funksionering

by P. A. J. Ryke
Published 1989-01-01

Is interspecific competition a major structuring force in animal communities?

by P. A. J. Ryke
Published 1987-03-01

Skepping deur evolusie

by P. A.J. Ryke
Published 1987-01-01

Eenheid en verskeidenheid in die insek legioene.

by P. A.J. Ryke
Published 1960-03-01

The terminal cretaceous extinction event

by P.A.J. Ryke
Published 1988-03-01

Die sosioniologifpolemiek

by P. A.J. Ryke
Published 1987-01-01

Man's impact on the environment

by P. A.J. Ryke
Published 1987-03-01