TY  - BOOK
AU  - Piper, C.f.,
AU  - Buster Adkins, C.,
ED  - Iadc Valves Conference
TI  - Valves
T2  - Mud equipment manual
SN  - 0872016226
AV  - TS277 P67
PY  - 1985///
CY  - Houston, Texas
PB  - Gulf Publishing Company
KW  - Válvulas
N1  - "much of the material in this handbook was originally presented at the iadc valves conference in houston, texas, october 4-6 1977"
ER  -