A feed of cases that cite 370 U.S. 421.
http://supreme.justia.com/
370 U.S. 4212007-12-13
http://supreme.justia.com/us/330/1/index.html
Everson v. Board of Education, 330 U.S. 1 (1947)1947-1-1
http://supreme.justia.com/us/333/203/index.html
McCollum v. Board of Education, 333 U.S. 203 (1948)1948-1-1
http://supreme.justia.com/us/343/306/index.html
Zorach v. Clauson, 343 U.S. 306 (1952)1952-1-1
http://supreme.justia.com/us/366/420/index.html
McGowan v. Maryland, 366 U.S. 420 (1961)1961-1-1
http://supreme.justia.com/us/262/447/index.html
Commonwealth of Massachusetts v. Mellon, 262 U.S. 447 (1923)1923-1-1
http://supreme.justia.com/us/319/624/index.html
West Virginia State Bd. of Educ. v. Barnette, 319 U.S. 624 (1943)1943-1-1