TY  - BOOK
AU  - Ervin, C.M..
TI  - In-situ testing for geotechnical investigations / 
SN  - 90 6191 506 6
U1  - Hp8,N83 
PY  - 1985///
CY  - Rotterdam : 
PB  - A.A.Balema , 
KW  - Soil and Rock Testing
ER  -