Portable direct writing drum recorder /
by Staff Columbia University, Geophysical Field Station, St. David's, Bermuda.
APA Citation
United States. Office of Naval Research., Lamont Geological Observatory. (1954). Portable direct writing drum recorder. Palisades, New York: Lamont Geological Observatory, (Columbia University).
MLA Citation
United States. Office of Naval Research, and Lamont Geological Observatory. Portable Direct Writing Drum Recorder. Palisades, New York: Lamont Geological Observatory, (Columbia University), 1954.
Warning: These citations may not always be complete (especially for serials).