TY  - BOOK
AU  - Erochin, J. M.
AU  - Frolov, V. I.
TI  - Problems and exercises in chemistry
SN  - 5-03-001752-6
PY  - 1990///
CY  - Μ.
PB  - Mir
KW  - Г1я7
KW  - rubbk
ER  -