Weakly admissible transformations for solving algebraic assignment and transportation problems -- Cutting planes from conditional bounds: A new approach to set covering -- Set covering algorithms using cutting planes, heuristics, and subgradient optimization: A computational study -- On the symmetric travelling salesman problem: Solution of a 120-city problem -- On the symmetric travelling salesman problem: A computational study -- A LIFO implicit enumeration algorithm for the asymmetric travelling salesman problem using a one-arborescence relaxation -- Polynomial bounding for NP-hard problems -- Worst case analysis of greedy type algorithms for independence systems -- Quadratic knapsack problems -- Fractional vertices, cuts and facets of the simple plant location problem -- Balanced matrices and property (G) -- Dual integrality in b-matching problems -- A technique for determining blocking and anti-blocking polyhedral descriptions -- Certain kinds of polar sets and their relation to mathematical programming