TY  - BOOK
AU  - Walden, J. 
AU  - Oldfield, F. Smith, J.
TI  - Environmental magnetism: a practical guide 
T2  - Technical Guide, No.06
SN  - 0-907780-42-3
PY  - 1999///
CY  - London
PB  - Quaternary Research Association
ER  -