Herman Roberson v. United States , 237 F.2d 536 ( 1956 )
Robert Henry Landsdown v. United States , 348 F.2d 405 ( 1965 )
Johnson v. United States , 63 S. Ct. 549 ( 1943 )
Chapman v. California , 87 S. Ct. 824 ( 1967 )