References
- Blum , S. 1981 . “Effect of an Environmental Science Curriculum on Student's Leisure Time Activities” . Journal of Research in Science Teaching , 18 ( no. 2 ) : 145 – 155 .
- Hart , P. and McClaren , M. 1978 . “Attitude of High School Students Toward Environmentally Oriented Issues” . Science Education , 62 ( no. 4 ) : 497 – 508 .
- Hurd , Bybee P.R. , Kahle , J. and Yager , R. 1980 . “Biology Education in Secondary Schools of the United States” . The American Biology Teacher , 42 ( no.7 ) : 388 – 410 .
- McTeer , J. 1978 . “Teenage-adult Differences in Concern for Environmental Problems” . The Journal of Environmental Education , 9 ( no. 2 ) : 20 – 23 .
- Strickland , A. and Staver , J. 1979 . “A Hoosier View of Ecological Attitudes and Knowledge” . Journal of Research in Science Teaching , 16 ( no. 3 ) : 249 – 253 .