TY  - BOOK
AU  - Trifonov,D.N
AU  - Trifonov,V.D
TI  - Chemical Elements:Hoe they were discovers
SN  - 5030007784
U1  - 546.1 TRI 
PY  - 1982///
CY  - MIR
PB  - Moscow
KW  - chemical elements
ER  -