APA
U S Department of Commerce, U S Department of Commerce, . (1948). Technical notes sources and methods used in the de. : .
Chicago
U S Department of Commerce, U S Department of Commerce, . 1948. Technical notes sources and methods used in the de. : .
Harvard
U S Department of Commerce, U S Department of Commerce, . (1948). Technical notes sources and methods used in the de. : .
MLA
U S Department of Commerce, U S Department of Commerce, . Technical notes sources and methods used in the de. : . 1948.
