TY  - BOOK
AU  - L ELLITHORPE
TI  - ROTARY DRILLING HAND BOOK ON ACCIDENT PREVENTION AND SAFE OPERATION PRACTICES
U1  - P551.3EL59R 
PY  - 1970///
KW  - ROTARY DRILLING HAND BOOK ON ACCIDENT PREVENTION AND SAFE OPERATION PRACTICES
N1  - GIFT
ER  -