Description
Item Description:Caption title.
Shipping list no.: 97-0071-P.
"October 1996"--P. 16.
Physical Description:16 pages : illustrations ; 28 cm.
Also avaiable via Internet from the National Park Service web site. Address as of 10/31/05: http://www.cr.nps.gov/hps/tps/briefs/brief40.htm; current access via PURL.
Bibliography:Includes bibliographical references (page 15).
ISSN:0885-7017 ;