na INLIS000000000007692 20221127024923 0010-1118007692 221127 g 0 eng The conditions of economic progress / Colin Clark CLARK, Colin 3rd ed. London : MacMillan, 1957 xv, 720 p. : ill. ; 22 cm. 338.9 CLA c 338.9 ECONOMIC DEVELOPMENT 3rd ed. Index: p. 705-714 740/65