2) Webb, R.G., Garrison, A.W., Keith, L.H., & McQuire, J.M. (August 1973) Current Practice in GC-MS Analysis of Organics in Water, Report No, EPA-R2-73-277, U.S. EPA.
3) Keith, L.H. (June 1975) Analysis of Organic Compounds in Two Kraft Mill Waste Waters, Report No. EPA-660/4-75-005, U.S. EPA.
4) Eichelherger, J.W., Middleton, W.M., & Budde, W.L. (September 1975) Analytical Quality Assurance for Trace Organics Analysis by Gas Chroma-tography-Mass Spectrometry, Report No. EPA-600/4-75-007 U.S. EPA.
5) Keith, L.H. (ed.) (1977) Identification and Analysis of Organic Pollutants in Water, Ann Arbor Science Publisher, Inc., Ann Arbor.