TY  - BOOK
AU  - Jennings,William Munro
TI  - Percussion drilling rigs and tools for shallow water wells,
U1  - 628.952 
PY  - 1934///
CY  - London
PB  - The Technical Press ltd.
KW  - Drilling and boring machinery
KW  - MCE
KW  - Wells
N1  - Advertising matter: p. ii, vi, 87-91; 0; 0; 0; 628_952000000000000_JEN
ER  -