in-the-matter-of-grand-jury-impaneled-january-21-1975-two-cases-appeal , 541 F.2d 373 ( 1976 )
united-states-of-america-and-boyd-w-hemphill-special-agent-of-the , 514 F.2d 368 ( 1975 )
United States v. Powell , 85 S. Ct. 248 ( 1964 )