Brief for appellee in answer to brief for Government of Puerto Rico, United States Court of Appeals, District of Columbia, no. 9769, Central Roig Refining Company, and Western Sugar Refining Company, appellants, Government of Puerto Rico, intervenor, v. Secretary of Agriculture, appellee, Porto Rican American Sugar Refinery, Inc., intervenor, American Sugar Refining Company et al., interveners, appeal from order of Secretary of Agriculture.