Robinson, Gilbert de Beauregard, 1906- The foundations of geometry/ by Gilbert de B. Robinson. - 3d ed. - Toronto: Univ. of Toronto Press, 1952. - xi, 168 p.: diagrs., 20 cm. - Mathematical expositions, no. 1. . Bibliography: p. 161-163. Subjects--Topical Terms: Geometry---Foundations. Dewey Class. No.: 516.1 / R661f