1. Ashley, James P., “A Study of the Impact of an Inservice Education Program on Teacher Behavior”, presented at the annual meeting of the National Association for Research in Science Teaching, Pasadena, Calif., February, 1969.
2. Evaluation of the Use of Science-A Process Approach with Pre-School Age Children”;Ayers;Science Education,1969
3. Benson, Keith S., “A Comparison of Two Methods of Teaching Fifth Grade Science” doctoral dissertation, Oklahoma State University, Norman, Oklahoma, 1968.