Contributed to Aqueducts, Tunnels, Canals, Pipelines, Siphons, and Water Distribution – UNESCO Encyclopedia of Life Support Systems, 2001.

    Gutwein, B., and R. Lang, "Regional Irrigation Water Demand," ASCE Journal of Irrigation and Drainage, October 1993.

    Herrera, T., R. Lang, and G. Tchobanoglous, "Emissions of Volatile Organic Constituents from Municipal Solid Waste Landfills," presented at 43rd Purdue Industrial Waste Conference, IN, May 1988.
    Holdsworth, K., and R. Lang, "Investigation of Main Supply Canal and Lateral Fluctuations," presented at ASCE Irrigation and Drainage Conference, Portland, Oregon, July 1987.

    Lang, R., and K. Holdsworth, "Water Conservation Projects in Imperial Irrigation District," presented at ASCE Irrigation and Drainage Conference, Honolulu, Hawaii, July 1991.

    Lang, R., T. Herrera, D. Chang, G. Tchobanoglous, and R. Spicher,   "Trace Organic Constituents in Landfill Gas," report prepared for the California Waste Management Board, January 1989.

    Lang, R., and G. Tchobanoglous, "Manual for Using Landfill Gas Movement Programs," prepared for the California Waste Management Board, November 1987.

    Lang, R., and G. Tchobanoglous, "Modeling Emissions of Trace Gases from Landfills," presented at the Air and Waste Management Association annual meting, Anaheim, California, June 1989.

    Lang, R., and G. Tchobanoglous, "Analytical Solutions to Steady-State Diffusional Flux of Landfill Gases," presented at the Air and Waste Management Association annual meeting, Kansas City, Missouri, June 1992.

    Lang, R., and G. Tchobanoglous, "A Study of the Aqua-Aerobic Traveling Bridge Filter Used for Wastewater Reclamation," report prepared for the Civil Engineering Department of U.C. Davis, 1986

    Lang, R., "Predicting Elevation Changes of the Salton Sea," report prepared for the Imperial Irrigation District, August 1993.

    Mull, S., R. Lang, S. Vigil, and H. Cota, "PC Windows Landfill Gas Movement Program," to be presented at ASME conference, April 1996.

    Melcer H., Lang R., Vigil S. and Maltby C.V. (1998).  Evaluation of the US EPA recommended approach to predicting air emissions from pulp and paper industry landfills.  Proceedings of the 1998 International Environmental Conference, TAPPI Press, Atlanta GA, 349-360.

    National Council of the Paper Industry for Air and Stream Improvement, Inc. (NCASI). 1999.  Evaluation of the US EPA recommended approach to predicting air emissions from pulp and paper industry landfills - In press.  Technical Bulletin No. XXX. Research Triangle Park, N.C.: National Council of the Paper Industry for Air and Stream Improvement, Inc.

    Stocker, R., Lang, R., and K. McLaughlin, "Resource Management Projects Related to the Salton Sea in Imperial and Riverside Counties," report prepared for the Imperial Irrigation District, September 1991.

    Tchobanoglous, G., R. Lang, and R. Weinshrott, "Filtration of Treated Wastewater for Reuse Applications," presented at 9th Symposium on Wastewater Treatment, Montreal, Canada, November 1986.

    Zensius, D., R. Lang, D. Chun, and R. Sakaji, “Backwash Process Evaluation for Full-Scale Biological Filters,” presented at the American Water Works Association National Conference, San Diego, CA, November 1998.