LIBERTY MUTUAL INSURANCE COMPANY, PETITIONER, v. NATIONAL LABOR RELATIONS BOARD, RESPONDENT. No. 78-1215.United States Court of Appeals, First Circuit.Argued October 4, 1978. Decided February 13, 1979. Page 596 [EDITORS’ NOTE: THIS PAGE CONTAINS HEADNOTES. HEADNOTES ARE NOT AN OFFICIAL PRODUCT OF THE COURT, THEREFORE THEY ARE NOT DISPLAYED.] Page 597 Kalvin M. Grove, Chicago, Ill., […]