Acoustic properties of headgear:  VIII. Sharpe Instruments, American Optical, and General Textile Mills ear protectors
By: Keith K. Neely and G. D. Thrasher.
Contributors: Thrasher, G. D.; Defence Research Medical Laboratories (Canada)
Publisher: Defence Research Medical Laboratories
Published: 1960
Place of publication: Toronto
Notes: DRML project no. 100.

PCC project no. D77-82-30-04.

Bibliographical references: p. 2-3.