TY  - BOOK
T1  - The Ordnance survey map skills book
A2  - Warn, Chris
LA  - English
PP  - Leeds
PB  - Arnold-Wheaton [u.a
YR  - 1980
UL  - http://glotrec.wdi-staging.gei.de/cat/Record/gei564440558
SN  - 0560667108
KW  - Schulbuch
ER  -