APA

Emmett W. W., . (1980). A field calibration of the sediment-trapping characteristics of the Helley-Smith bedload sampler. Washington: U.S. Govt. Print. Off. : for sale by the Supt. of Docs.

Chicago

Emmett William W, . 1980. A field calibration of the sediment-trapping characteristics of the Helley-Smith bedload sampler. Washington: U.S. Govt. Print. Off. : for sale by the Supt. of Docs.

Harvard

Emmett W. W., . (1980). A field calibration of the sediment-trapping characteristics of the Helley-Smith bedload sampler. Washington: U.S. Govt. Print. Off. : for sale by the Supt. of Docs.

MLA

Emmett William W, . A field calibration of the sediment-trapping characteristics of the Helley-Smith bedload sampler. Washington: U.S. Govt. Print. Off. : for sale by the Supt. of Docs. 1980.