The principles of sound signalling,

Gorde:
Xehetasun bibliografikoak
OCLC:7779775
Egile nagusia: Hart, Morris Daniel
Beste egile batzuk: Smith, W. Whately (Walter Whately), 1892-1947 (joint author.)
Hizkuntza:English
Argitaratua: New York, D. Van Nostrand, 1925.
Gaiak:
Formatua:

Monograph

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