APA (7th ed.) Citation

United States. Bureau of Mines. (1924). Radio as method for underground communication in mines. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Radio as Method for Underground Communication in Mines. [Washington]: [publisher not identified], 1924.

MLA (9th ed.) Citation

United States. Bureau of Mines. Radio as Method for Underground Communication in Mines. [publisher not identified], 1924.

Warning: These citations may not always be 100% accurate.