A feed of cases that cite 421 U.S. 21.
http://supreme.justia.com/
421 U.S. 212007-12-13
http://supreme.justia.com/us/362/17/index.html
United States v. Raines, 362 U.S. 17 (1960)1960-1-1
http://supreme.justia.com/us/417/733/index.html
Parker v. Levy, 417 U.S. 733 (1974)1974-1-1
http://supreme.justia.com/us/418/676/index.html
Secretary of the Navy v. Avrech, 418 U.S. 676 (1974)1974-1-1
http://supreme.justia.com/us/420/738/index.html
Schlesinger v. Councilman, 420 U.S. 738 (1975)1975-1-1
http://supreme.justia.com/us/363/603/index.html
Flemming v. Nestor, 363 U.S. 603 (1960)1960-1-1
http://supreme.justia.com/us/372/144/index.html
Kennedy v. Mendoza-Martinez, 372 U.S. 144 (1963)1963-1-1
http://supreme.justia.com/us/419/90/index.html
Gonzalez v. Automatic Employees Credit Union, 419 U.S. 90 (1974)1974-1-1
http://supreme.justia.com/us/290/30/index.html
Ex Parte Poresky, 290 U.S. 30 (1933)1933-1-1
http://supreme.justia.com/us/370/713/index.html
Idlewild Bon Voyage Liquor Corp. v. Epstein, 370 U.S. 713 (1962)1962-1-1
http://supreme.justia.com/us/409/512/index.html
Goosby v. Osser, 409 U.S. 512 (1973)1973-1-1
http://supreme.justia.com/us/369/31/index.html
Bailey v. Patterson, 369 U.S. 31 (1962)1962-1-1
http://supreme.justia.com/us/282/10/index.html
STRATTON v. ST. LOUIS SOUTHWESTERN RY. CO., 282 U.S. 10 (1930)1930-1-1
http://supreme.justia.com/us/404/1/index.html
Hicks v. Pleasure House, Inc., 404 U.S. 1 (1971)1971-1-1
http://supreme.justia.com/us/331/100/index.html
Fleming v. Rhodes, 331 U.S. 100 (1947)1947-1-1
http://supreme.justia.com/us/419/7/index.html
United States v. American Friends Svc. Comm., 419 U.S. 7 (1974)1974-1-1
http://supreme.justia.com/us/401/37/index.html
Younger v. Harris, 401 U.S. 37 (1971)1971-1-1