TY  - BOOK
AU  - NATARAJAN, V
TI  - Sealing techniques : what, why and how
U1  - 378.167 2 N26S 
PY  - 1986///
PB  - New Delhi
KW  - GRADING AND MARKING (STUDENT) -- STANDARDIZATION
KW  - GRADING AND MARKING (STUDENT) -- STANDARDI
ER  -