“Characteristics and challenges of sustainable beef production in western US”
, in Strategic Supplementation of Beef Cattle Consuming Low-Quality Roughages in the Western United States
, Oregon State University Agricultural Experiment Station, 2000.
“Congeneric Serpentine and Nonserpentine Shrubs Differ More in Leaf Ca:Mg than in Tolerance of Low N, Low P, or Heavy Metals”
, Plant and Soil
, vol. 2803012910615254324512117621221607148506416045594413791470436412741071573097134167215862, no. 1-2Suppl., pp. 49 - 64, 2006.