SPANS IS LINKED TO CASH DEMAND
Harry L Sears testifies at Mitchell-Stans trial that he was told by Laurence B Richardson Jr, an assoc of financier Robert L Vesco, that Maurice Stans wanted Vesco's $200,000 contribution to Pres Nixon's re-election campaign to be given in cash; Stans has testified before grand jury in '73 that he did not specify cash; says Vesco was not happy about request for cash, and asked Pres Nixon's bro Edward to confirm it with Stans; says Stans did not mind accepting money 3 days after effective date of new campaign finance disclosure law; Stans has said he did not rept contribution because it was pledged before effective date; Sears testifies he wrote memo about Vesco to John Mitchell on Jan 12 '72 in answer to Mitchell's request for information to give to John D Ehrlichman, then Pres Nixon's chief domestic adviser; says Ehrlichman had been asked to put in 'a good word' for Vesco at various US embassies overseas; Mitchell has testified to grand jury that Sears never gave him anything in writing about vesco; Stans illus (L)