Correction

An Oct. 1 Monitor business article on the integrated oil companies stated that ''Royal Dutch/Shell bought out Shell Oil of Houston'' in an acquisition similar to Chevron's acquisition of Gulf Oil. In fact, unlike Chevron's complete acquisition of Gulf, Royal Dutch/Shell to date has acquired 95 percent of Shell Oil's common stock. As of this writing a proposed merger is awaiting the outcome of litigation filed by disgruntled shareholders.

The article also stated that Standard Oil of Indiana (Amoco) was one of the ''seven sisters'' of the oil world. Although Amoco was not traditionally a ''sister,'' the disappearance of Gulf from the list this year moved Standard of Indiana into the No. 7 spot in sales and assets.