Now we must sign a supplementary contract which is primarily concerned with the percentage of the money that we are to receive."

Under the supplementary contract "we shall get 20 per cent of all that Bill gets--that is, 20 per cent of his share of the gross proceeds.

The Rockwell International Corporation said the National Aeronautics and Space Administration had awarded it a supplementary contract valued at $375 million to build a set of spare orbiter structural components for the space shuttle.

The players in the orchestra, which was one of the nine ensembles that went on strike in January, voted on Feb. 8 to accept the general contract binding the freelance orchestras that were bargaining as a consortium, but they reserved the right to negotiate a supplementary contract.

Five months later on February 21, 1969, Rothko entered into an agreement with Marlborough A.G., a Lichtenstein corporation with international galleries, which provided in part that he agreed "not to sell any works of art for a period of eight years, except to Marlborough A.G. if a supplementary contract is made."