00307 a2200109 4500 8120403614 622.33819 CHU Chugh, C P Drilling Technology Handbook C P Chugh New Delhi : Oxford and IBH Publishing, 1977 xx, 460p. : ill. ; 20 cm Drilling Technology 958 958 0 0 0 0 NIT NIT CE 0000-00-00 0 622.33819 CHU NIT-133 2017-01-05 2017-01-05 BK