1. A review of possible causes of nutrient enrichment and decline of endangered sucker populations in Upper Klamath Lake, Oregon Author/Creator: Bortleson, Gilbert Carl, 1940- Publication/Creation: Denver, Colo. : Earth Science Information Center, Open-File Reports Section [distributor]. Resource Type: Book Access & Availability: Loading
2. A review of possible causes of nutrient enrichment and decline of endangered sucker populations in Upper Klamath Lake, Oregon Author/Creator: Bortleson, Gilbert Carl, 1940- author Publication/Creation: Portland, Oregon : U.S. Geological Survey, 1993 Resource Type: Book Access & Availability: Loading