CHAWLA K.K. creator text NEW DELHI LALYANI 2014 monographic V.P. MATHEMATICS & OPERATION RESEARCH INTRODUCTION TO OPERATIONS RESEARCH, MATRICES, THEORY OF PROBABILITY, LINEAR PROGRAMMING, LPP- SIMPLEX METHOD, TWO PHASE SIMPLEX METHOD, DUALITY, DUAL SIMPLEX, ASSIGNMENT PROBLEM, GAME THEORY, NETWORK ANALYSIS-PERT AND CPM, INVENTORY CONTROL, 658.4034, CHA 9789327231137