Selected data on federal R&D funding by budget function.

MLA

National Science Foundation (U.S.). Selected data on federal R&D funding by budget function. Washington, D.C. : Science and Engineering Indicators Program, Division of Science Resources Studies, National Science Foundation, 1991-

APA

National Science Foundation (U.S.). (1992). Selected data on federal R&D funding by budget function. Washington, D.C. : Science and Engineering Indicators Program, Division of Science Resources Studies, National Science Foundation.

Chicago

National Science Foundation (U.S.). Selected data on federal R&D funding by budget function. Washington, D.C. : Science and Engineering Indicators Program, Division of Science Resources Studies, National Science Foundation, 1991-