Public [act] 213-297½ 298-346, 74th Congress. Monongahela River. H. R. 7438. act to amend act to authorize construction of certain bridges across Monongabela, Allegheny, and Youghingheny rivers in county of Alleghery. Pa. [by Allegheny County Authority and county of Allegheny. Pa., or either of them].