------------------------------------------------------ McCARTNEY, ROBERT J. Articles and editorials Defecting Nicaraguan Contra's Tale, 11200 [8MY] Defecting Nicaraguan Contra's Tale--Former Field Commander Charges Widespread Abuses, 14966 [10JN] Gunmen Seen Singling Out U.S. Marines, 18525 [10JY] Salvadoran Rebel Leaders Vow To Extend War, 18127 [9JY] U.S. Seen Assisting Duarte in Sunday's Salvadoran Vote, 18849 [11JY] Venezuelan Agency Aids Salvadoran Parties, 18850 [11JY]