IN THE MATTER OF SIERRA TRADING CORPORATION, DEBTOR. BUTTES GAS OIL COMPANY ET AL., PETITIONERS-APPELLANTS, v. L. W. WINKLER, JR., TRUSTEE IN BANKRUPTCY, TRUSTEE-APPELLEE. No. 72-1582.United States Court of Appeals, Tenth Circuit. July 12, 1973. Page 334 Raymond J. Gengler, Denver, Colo., for petitioners-appellants. James A. Clark, Denver, Colo., for trustee-appellee. Appeal from the United […]