TY  - GEN
AU  - Lewin,Keith M.
AU  - Rass,Angus R.
TI  - Science kits in developing countries an appraisal of potential
U1  - 373.19 
CY  - Paris
PB  - International Institute for Educational Planning
KW  - Education
KW  - Secondary education
KW  - Secondary education, curriculums
N1  - With bibliography, appendix
ER  -