Cooperation with United States Bureau of Mines Film Development1946-03-19unknownhttp://rightsstatements.org/vocab/NKC/1.0/enghttp://congressarchives.org/record/CAC_CC_047_1_3_34_0003The document is from the Tulsa Chamber of Commerce to Representative George B. Schwabe, thanking him for introducing Mr. Morton F. Leopold from the United States Bureau of Mines. The Chamber of Commerce staff have provided Mr. Leopold with cooperation for the preparation of a film.