TY  - BOOK
ED  - Indian standards institution                                                                                                                                                                                                                                   . 
TI  - Safety code for scaffolds and ladders ,Part 1 scaffolds,IS:3696-1987 / 
U1  - 690.57 
PY  - 1988///
CY  -  : 
PB  - ISI , 
ER  -