TY  - BOOK
AU  - Parthasarathy , K.
AU  - Jayalakshmi, S,
TI  - Environmental Sanitation
U1  - 628 
PY  - 1974///
CY  - Tiruchirappalli
PB  - School of education /BharathidasUniversity , Khajamalai campus, Tiruchirappalli
ER  -