Report on the U.S. Geological Survey's evaluation program for standard reference samples distributed in April 1993
Subtitle: T-123 (trace constituents), T-125 (trace constituents), M-126 (major constituents), N-38 (nutrients), N-39 (nutrients), P-20 (low ionic strength), and Hg-16 (mercury)
By: by H. Keith Long and Jerry W. Farrar.
Contributors: Farrar, Jerry W.; Geological Survey (U.S.)
Series: U.S. Geological Survey open-file report -- 93-436.
Publisher: U.S. Geological Survey; Books and Open-File Reports [distributor]
Published: 1993
Place of publication: Golden, Colo; Denver, CO
Language: eng
Format: Microform
Number of pages: 149
Subjects: Water quality -- United States -- Measurement; Laboratories -- United States -- Management
Notes: Chiefly tables.

Shipping list no.: 94-0603-M.

Includes bibliographical references (p. 10).

Microfiche. [Washington] : Supt Docs/GPO, [1994]. 2 microfiches.

s 1994 dcu n b.