WELCHONS, A. M.
Plane geometry, by A. M. Welchons & W. R. Krickenberger.
WELCHONS, A. M. Plane geometry, by A. M. Welchons & W. R. Krickenberger. © 19Jan33; A60144. W. R. Krickenberger (A); 23Dec60; R268317.
W. R. Krickenberger|A