00471nam a2200181Ia 4500 28493 20260707172127.0 0 19 644047 5 KE-NaSUL HB135.D56 1967 28493 28493 Dinwiddy, C. 11759 Elementary mathematics for economists Dinwiddy, C. New York Oxford University Press 1967 232p. Mathematical economists 11760 BOOK CM 28493 28492