Acoustic properties of headgear.  XII:  Two earmuff devices
By: Keith K. Neely and E. K. Underwood.
Contributors: Underwood, E. K.; Defence Research Medical Laboratories (Canada)
Series: Defence Research Medical Laboratories.  Technical memorandum -- no. 100-13
Publisher: Canada, Dept. of National Defence, Defence Research Board, 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. 2-3.