Holdings: A portable magnetometer of the Null type.

Bibliographic Details
Main Creator:	Great Britain. Ordnance Survey.
Format:	Book
Language:	English
Published / Created:	London : H. M. Stationery off., 1930.
Subjects:	Magnetometers.
Notes:	Physical description: [6] p. : ill ; 30 cm. (fol.)

Call Number	View In	Collection
538 o 2	Offsite Main Reading Room Item stored offsite Order 1 week in advance	General