Ohcanbohtosat - "chemistry."

The teaching of chemistry in tropical secondary schools / Dahkki Newbury, N. F.

Fáttát: “…Chemistry Study and teaching (Secondary) Tropics.…”

University chemical education : proceedings of the International Symposium on University Chemical Education, held in Frascati (Rome), Italy, 16-19 October 1969 /

Fáttát: “…Chemistry Study and teaching (Higher) Congresses.…”