235 N.W. 372 PAUL G. RAST AND ANOTHER v. W. J. BERGQUIST AND ANOTHER.[1] No. 28,170.Supreme Court of Minnesota. January 23, 1931. [1] Reported in 235 N.W. 372. Integration of agreement by letter excluded parol evidence. It is not necessary, in order to integrate and so become the exclusive evidence of the terms of a […]