1. Armstrong, N. E. 1979. Nutrient exchange studies on the seagrasses of Texas. Center for Research in Water Resources, U. Texas at Austin. CRWR-161. 91 pp.
2. Armstrong, N. E. and B. A. Brown. 1977. Exchange of carbon, nitrogen, and phosphorus in Lavaca Bay, Texas marshes. Volume 1. The role of sediments and nutrients exchange in the Lavaca Bay brackish marsh system. Center for Research in Water Resources, U. Texas at Austin. CRWR-147. 82 pp.
3. Armstrong, N. E. and V. N. Gordon. 1978a. Exchange rates for carbon, nitrogen, and phosphorus in the Colorado River delta marshes. Center for Research in Water Resources, U. Texas at Austin. CRWR-153. 37 pp.
4. Armstrong, N. E. and V. N. Gordon. 1978b. Exchange rates for carbon, nitrogen, and phosphorus in Nueces and San Antonio Bay marshes. Center for Research in Water Resources, U. Texas at Austin. CRWR-152. 144 pp.
5. Armstrong, N. E. and V. N. Gordon. 1981. Nutrient budget for Matagorda Bay. Center for Research in Water Resources, U. Texas at Austin. CRWR-181. 92 pp.