TY  - BOOK
AU  - Vadetsky,Yu V.
AU  - Gusman,M.T.
AU  - Forrest,J.
AU  - Gusman,M.T.
AU  - Forrest,J.
ED  - Drilling Techniques Institute
ED  - World Petroleum Congress (11th. : 1983 : London)
ED  - Drilling Techniques Institute
TI  - Bottom hole screw motors for oil and gas drilling
U1  - 060-665.5 W938 1983 
ER  -