00495nam a22001937a 4500 NUST - PNEC 20170116180811.0 150504b xxu||||| |||| 00| 0 eng d 0750607467 LIBRARY 363.11 JOH 3388 Ridley John. Safety at Work John Ridley 4th ed. London: Butter worth, c 1994. 794 p . : 3389 Safety at work Industrial safety. ddc BK 63381 63381 0 0 ddc 0 0 PNEC PNEC WING-A 1999-01-07 Abrar & Sons ( Library Grant ) 2913.00 0 363.11 JOH PNECLIB-020309 2015-05-04 2913.00 1999-01-07 BK