Child welfare workers--Training of--Oklahoma.; Child welfare workers--Certification--Oklahoma.; Oklahoma. Department of Human Services. Child Support Enforcement Division--Officials and employees--In-service training.;
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.