References
- Exline , Joseph D. 1973 . “Spotlight on LESP.” . Science Activities: Classroom Projects and Curriculum Ideas , January : 43 – 45 .
- Exline , Joseph D. 1973 . “Summer Science: Relevant, Meaningful, and Useful.” . The Science Teacher , April : 40 – 41 .
- Exline , Joseph D. 1975 . Individualized Techniques for Teaching Earth Science , 111 – 45 . West Nyack , N. Y. : Parker Publishing Co. .