TY  - BOOK
AU  - Bactol, Mercedes F. 
AU  - Bactol, Mercedes F. 
TI  - Mathematics of smoking
U1  - DPer 370.5 M720 June - December 2017 v66 no. 1-7 
PY  - 2017///
CY  - Philippines : 
PB  - Papi Publishers, Inc., 
KW  - Smoking
KW  - Cigarettes
KW  - Smoking cessation programs
ER  -