1. Cyanobacteria, cyanotoxin synthetase gene, and cyanotoxin occurrence among selected large river sites of the conterminous United States, 2017--18 Author/Creator: Zuellig, Robert E., author Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2021 Resource Type: Book Access & Availability: Loading
2. Estimating invertebrate response to changes in total nitrogen, total phosphorus, and specific conductance at sites where invertebrate data are unavailable Author/Creator: Zuellig, Robert E., author Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2021 Resource Type: Book Access & Availability: Loading
3. Comparability among four invertebrate sampling methods, Fountain Creek Basin, Colorado, 2010-2012 Author/Creator: Zuellig, Robert E., author Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2014 Resource Type: Book Access & Availability: Loading
4. Assessing the use of existing data to compare plains fish assemblages collected from random and fixed sites in Colorado Author/Creator: Zuellig, Robert E., author Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2013 Resource Type: Book Access & Availability: Loading
5. Temporal change in biological community structure in the Fountain Creek basin, Colorado, 2001-2008 Author/Creator: Zuellig, Robert E., author Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2010 Resource Type: Book Access & Availability: Loading