REFERENCES
- Champagne , A.B. and Klopfer , L.E. 1977 . a sixty year perspective on three issues in science education . Science Education , 61 : 431 – 452 .
- Dillashaw , F.G. and Okey , J. R. 1980 . Test of the integrated science process skills for secondary students . Science Education , 64 : 601 – 608 .
- Molitor , L.L. and George , K.D. 1976 . Development of a test of science process skills . Journal of Research in Science Teaching , 13 : 405