Content-type: text/application/x-research-info-systems TY - JOUR AU - Appa, Gautam TI - Contributions to OR and Economics: The Twentieth Anniversary of CORE JA - J Oper Res Soc PY - 1993/08//print VL - 44 IS - 8 SP - 839 EP - 840 PB - Operational Research Society SN - 0160-5682 UR - http://dx.doi.org/10.1057/jors.1993.143 ER -