TY  - BOOK
AU  - Sereda,N.G..
AU  - Solovgov,E.M..
AU  - Shiffer,V.V..
TI  - Drilling of oil and gas wells / 
U1  - HX,4(D32) 
PY  - 1977///
CY  - Moscow : 
PB  - Mir Publishers , 
N1  - NULL
ER  -