Acoustic properties of headgear.  XI:  Two suspensions and two ear seal combinations
By: Keith K. Neely and G. D. Thrasher.
Contributors: Thrasher, G. D.; Defence Research Medical Laboratories (Canada)
Series: Defence Research Medical Laboratories.  Technical memorandum -- no. 100-12
Publisher: Defence Research Medical Laboratories
Published: 1960
Place of publication: Toronto
Notes: DRML project no. 100.

PCC project no. D50-89-01-01.

Bibliographical references: p. 3-4.