WELCHONS, A. M.
Plane geometry, by A. M. Welchons & W. R. Krickenberger. Rev. ed.
WELCHONS, A. M. Plane geometry, by A. M. Welchons & W. R. Krickenberger. Rev. ed. © 25Jul40; A143778. Elsie M. Krickenberger (W); 5Feb68; R429060.
Elsie M. Krickenberger|W