A Borehole geophone leveling device
By: by Hsi-Ping Liu ... [et al.].
Contributors: Liu, Hsi-Ping.; Geological Survey (U.S.)
Series: Open-file report -- 86-351.; U.S. Geological Survey open-file report -- 86-351.
Publisher: Dept. of the Interior, U.S. Geological Survey
Published: 1986
Place of publication: [Reston, Va.?]
Language: eng
Format: Microform
Subjects: Borings -- Instruments.; Geophone.; Leveling -- Instruments.
Notes: Distributed to depository libraries in microfiche.

Bibliography: leaf 6.

Microfiche. [Denver, Colo. : U.S. Geological Survey, 1986?]. 1 microfiche ; 11 x 15 cm.