TY - BOOK AU - Long, H. Keith. AU - Farrar, Jerry W. CN - I 19.76: CY - Golden, Colo. : CY - Denver, CO : DA - 1993. ID - 197944 KW - Laboratories KW - Water quality N1 - Distributed to depository libraries in microfiche. N1 - Shipping list no.: 93-1307-M. PB - Dept. of the Interior, U.S. Geological Survey ; PB - Books and Open-File Reports [Section, distributor], PP - Golden, Colo. : PP - Denver, CO : PY - 1993. T1 - Report on the U.S. Geological Survey's evaluation program for standard reference samples distributed in October 1992, T-121 (trace constituents), M-124 (major constituents), N-36 (nutrients), N-37 (nutrients), P-19 (low ionic strength) and Hg-15 (mercury) TI - Report on the U.S. Geological Survey's evaluation program for standard reference samples distributed in October 1992, T-121 (trace constituents), M-124 (major constituents), N-36 (nutrients), N-37 (nutrients), P-19 (low ionic strength) and Hg-15 (mercury) ER -