TY  - BOOK
AU  - 3GE-Learning
TI  - 3GE collection on chemistry: Chalcogen Chemistry
SN  - 978-1-98468-095-2
PY  - 2023///
CY  - New York
PB  - 3GE- Learning LLC 
KW  - Chalkogen
KW  - Chemical elements
ER  -