Also. . .

Planet Hollywood International Inc. announced a key franchising agreement with Saudi Prince Alwaleed Bin Talal that would add 34 new restaurants in 23 countries. . . . Exxon Corp., Mobil Corp., Atlantic Richfield Co., other oil firms and Texas A&M; University won U.S. approval to form a research-and-development venture to study oil exploration. . . . Giant Industries Inc. said it agreed to buy or lease 96 gas stations and convenience stores from closely held Thriftway Marketing Corp.