COFFEE QUOTA TALKS CONTINUE BUT NO AGREEMENT YET Coffee quota talks at the International Coffee Organization council meeting here continued this afternoon, but producers and consumers still had not reached common ground on the key issue of how to estimate export quotas, delegates said. The 54 member contact group was examining a Colombian proposal to resume quotas April 1 under the ad hoc system used historically, with a pledge to meet again in September to discuss how quotas would be worked out in the future, they said. Delegates would not speculate on the prospects for agreement at this time. "Anything could happen," one delegate said.