Mines and mineral resources. Development of strategic and critical minerals, hearing, 76th Congress, 3d session, on S. 4008, to authorize Reconstruction Finance Corporation to make loans for development of deposits of strategic and critical minerals and other metallic and nonmetallic minerals, and to authorize Reconstruction Finance Corporation to make more adequate loans for mineral developmental purposes, and S. 4013, providing for small loans by Reconstruction Finance Corporation to facilitate preliminary development and production of strategic, critical, and other metallic and nonmetallic minerals, May 28, 1940.