Oru, Stephen. "The use of an observational system for instructional analysis (O.S.I.A.) and some ethnographic methods for the description of an \Artists-in-Schools\" program-model /"." Doctoral dissertation, Ohio State University, 1978. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487081370610587Chicago Manual of Style (17th edition)