TY  - BOOK
T1  - Ordnance survey of the county of Londonderry / by Colonel Colby.
A1  - Colby, Thomas Frederick, 1784-1852
A2  - Petrie, George, 1790-1866
A2  - O'Donovan, John, 1809-1861 LL.D
LA  - English
PP  - Dublin
PB  - published for Her Majesty's Government, Hodges and Smith
YR  - 1837
UL  - https://web.marshlibrary.ie/catalogue/Record/7543
CN  - Y.3.37 (office bay 6 shelf 5)
ER  -