Spotting Technologies used by U.S. Observation Battalion

Title (Dublin Core): Spotting Technologies used by U.S. Observation Battalion
Subject (Dublin Core): en Technology; en Artillery (and shells); en Communication; en Reconnaisance
Article Title and/or Image Caption (Dublin Core): Title: Sensitive microphones spot hidden guns
Contributor (Dublin Core): Hickman Powell (Article Writer)
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): World War II
Date Issued (Dublin Core): 1942-01
Is Part Of (Dublin Core): Popular Science Monthly, v. 140, n. 1, 1942
pages (Bibliographic Ontology): 71-72
Rights (Dublin Core): Public Domain (Google Digitized)
Source (Dublin Core): Google Books
Archived by (Dublin Core): Roberto Meneghetti; Marco Bortolami (editor)
Spatial Coverage (Dublin Core): United States of America