APA

Spahr N. E., . (2000). Water quality in the Upper Colorado River Basin, Colorado, 1996 - 98. Reston, Va: US Dep. of the Interior, US Geological Survey.

Chicago

Spahr Norman E, . 2000. Water quality in the Upper Colorado River Basin, Colorado, 1996 - 98. Reston, Va: US Dep. of the Interior, US Geological Survey.

Harvard

Spahr N. E., . (2000). Water quality in the Upper Colorado River Basin, Colorado, 1996 - 98. Reston, Va: US Dep. of the Interior, US Geological Survey.

MLA

Spahr Norman E, . Water quality in the Upper Colorado River Basin, Colorado, 1996 - 98. Reston, Va: US Dep. of the Interior, US Geological Survey. 2000.