Thermal analysis of the ISCO 1680 portable wastewater sampler /

"June 1980."

Performance tests for the evaluation of computerized gas chromatography/mass spectrometry equipment and laboratories /

"April 1980"--Cover.

Calibration of a 90 V̊-notch weir using parameters other than upstream head /

Mode of access: Internet.

USEPA manual of methods for virology : chapter 13.

Chiefly tables.

Ambient water quality criteria for lead /

Mode of access: Internet.

Ambient water quality criteria for chlorinated benzenes /

Mode of access: Internet.

Ambient water quality criteria for chromium /

Mode of access: Internet.

Ambient water quality criteria for heptachlor /

Mode of access: Internet.