TY - BOOK AU - Coffman, C. V. AU - Fix, G. J. TI - CONSTRUCTIVE APPROECHES TO MATHEMATICAL MODELS U1 - 001.424 PY - 1979/// CY - New York PB - Academic Press KW - Mathematical Models -- Congresses N1 - Proceedings Of A Conference Held In Honour Of R. J. Duffin, Pettsburgh, 1978 ER -