TY  - BOOK
AU  - Chang,Raymond
TI  - General chemistry: the essential concepts 
SN  - 0072410671
U1  - 540 21
PY  - 2003///
CY  - Dubuque, Iowa
PB  - McGraw-Hill
KW  - Chemistry
KW  - Hóa học
N1  - Rev. ed. of: Essential chemistry. 2nd ed. c2000
ER  -