A symposium entitled "Recent Advances in Middle Carboniferous Biostratigraphy" was held at Stillwater, Oklahoma, on March 5, 1990 , as part of the annual meeting of the South-Central Section, Geological Society of America.
Crops and climate--Oklahoma--Statistics--Periodicals.;Cattle--Climatic factors--Statistics--Periodicals.;Oklahoma--Climate--Statistics--Periodicals.
issues through 2011; cooperating with the Oklahoma Department of Agriculture, Food and Forestry; a combined contribution with Cooperative Extension Service, USDA Farm Service Agency and Oklahoma Mesonet