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Pennsylvania et al. v. Board of Directors of City Trusts of the City of Philadelphia; Amity Estates, Inc., et al. v. Werking; Wolf v. Boyd, District Director, Immigration and Naturalization Service; Olaf Pedersen's Rederi A/S v. Motor Distributors, Ltd., et al., 1957 — 353 U.S. 989 · caselaw · US