TY  - BOOK
AU  - Ratho, T N
TI  - Modern encyclopaedia of science teaching, v1-teaching of biology, v2-teaching of botany, v3-teaching of Chemistry, v4-teaching of Physics, v5-teaching of zoology
U1  - 373.24 R188M 
PY  - 1994///
CY  - Delhi
PB  - Kanishka
ER  -