JAPAN SEEMS KEY IN SOVIET TACTICS; JAPAN SEEMS KEY IN SOVIET TACTICS Quemoy-Matsu Problem Has Obscured Moscow's Effort to Reach Pact With Tokyo
Reston sees USSR hoping to conclude pact by Apr 28, date specified in San Francisco pact when Japan must conclude pact with USSR, thereby winning Japan's consent to carry out Yalta accord assigning S Sakhalin and Kuriles to USSR; sees Japan willing if it gets back Habomais and Shikotan; cites US Sen rider holding San Francisco pact does not give USSR right to isles