TY  - BOOK
AU  - UNESCO
TI  - New trends in chemistry teaching--vol-1 # New trends in chemistry teaching--vol-1  (1964--1965) # New trends in Chemistry teaching: Vol 1 (1964--1965)
U1  - 540.7 
PY  - 1968///
CY  - Unesco
PB  - United Nations
ER  -