Revision History for U.S. Geological Survey Techniques and Methods, book 9, chapter A0

By U.S. Geological Survey

General Introduction for the "National Field Manual for the Collection of Water-Quality Data"

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Posted online February 28, 2018

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Revised and reposted June 22, 2018, version 1.1


The model number was changed in the photo caption on the back of the front cover as follows: "D-99" was changed to "D-96".

The text layout was changed from single-column to dual-column format and a back cover was added.