Progress of seismological investigations in the United States.
Subtitle: July 1, 1927 to January 1, 1930 (Report to the Section of Seismology of the International Geodetic and Geophysical Union, International Research Council)
By: by N. H. Heck.
Series: Special publication -- no. 167; Special publication (U.S. Coast and Geodetic Survey) -- no. 167.
Publisher: U.S. Govt. Print. Off.
Published: 1930
Place of publication: Washington
Language: eng
Number of pages: 14
Subjects: Earthquakes -- United States
Notes: At head of title: Dept. of Commerce. R.P. Lamont, secretary. U.S. Coast and Geodetic Survey. R.S. Patton, director.