Acoustic properties of headgear.  XIII:  Three ear cups
By: Keith K. Neely and F. L. Peterson.
Contributors: Peterson, F. L.; Defence Research Medical Laboratories (Canada)
Series: Defence Research Medical Laboratories.  Technical memorandum -- no. 100-14
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.