A. M. Ritchie

XII—Can Animals See? A Cartesian Query

A. M. Ritchie, 1964 .

EVALUATION OF ROCKFALL AND ITS CONTROL

A. M. Ritchie, 1963 .

The Erosional Origin of the Mima Mounds of Southwest Washington

A. M. Ritchie, 1953, The Journal of Geology.