Water balance and quantification of total phosphorus and total nitrogen loads entering and leaving the Lago de Cidra, Central Puerto Rico

By Ramos-Ginés, Orlando..
San Juan, P.R. | Denver, CO U.S. Geological Survey | Branch of Information Services [distributor] 1997 .
v, 28 p. 28 cm..

Effects of changes in reservoir operations on water quality and trophic state indicators in Voyageurs National Park, northern Minnesota, 2001-03

By Christensen, Victoria G..
Reston, Va. | Denver, CO U.S. Dept. of the Interior, U.S. Geological Survey | U.S. Geological Survey, Information Services [distributor] 2004 .
vi, 42 p. , Shipping list no.: 2005-0054-M. | Title from resource itself. | Description based on content as of: August 27, 2004. 28 cm..

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Water balance and quantification of total phosphorus and total nitrogen loads entering and leaving the Lago de Cidra, Central Puerto Rico

Effects of changes in reservoir operations on water quality and trophic state indicators in Voyageurs National Park, northern Minnesota, 2001-03