EDGE.W.L, . (1931). THE THEORY OF RUILD SURFACES. CAMBRADGE: AT THE UNIVERSITY PRESS.
EDGE.W.L, . 1931. THE THEORY OF RUILD SURFACES. CAMBRADGE: AT THE UNIVERSITY PRESS.
EDGE.W.L, . THE THEORY OF RUILD SURFACES. CAMBRADGE: AT THE UNIVERSITY PRESS. 1931.