PLAN IS ANNOUNCED BY U.S AND GERMANY TO STABILIZE DOLLAR
US and W Ger announce series of joint actions to stabilize value of dollar and to demonstrate greater agreement on basic econ policy; moves, taken by US Sec W Michael Blumenthal and W Ger Sec Hans Matthofer, will add $2.74 billion worth of W Ger marks to US stockpile of foreign currencies that can be used to buy dollars on mkts and thus keep their value from falling on internatl exchs; W Ger is to make available $2 billion in marks, giving US ability to enter public mkt, buy up dollars, mop up excess supplies and thus relieve downward pressure on price of dollar; US further signals willingness to borrow if and as necessary up to $5-billion from IMF for same purpose; Fed Reserve and Bundesbank double amt of their own swap facility, to $4 billion, from $2 billion, and US says it will sell $740 million of its SDRs on IMF; other measures detailed; dollar still tumbles following announcement; Repr Henry S Reuss comments; Matthofer illus with W Ger Central Bank pres Otmar Emminger (L)