TY  - BOOK
AU  - Harley,J.B.
TI  - Ordnance survey maps a descriptive manual
PY  - 1975///
CY  - Southampton
PB  - Ordnance Survey
KW  - Great Britain
KW  - Ordnance Survey
KW  - Cartography
KW  - Maps, Popographic
N1  - Bibliography: pp. 185-191; index: pp. 193-200
ER  -