UID:
edocfu_9961074210302883
Umfang:
viii, 51 pages :
,
DJVU, image file.
Serie:
U.S. Geological Survey open-file report ; 81-690
Anmerkung:
Title from title screen (viewed Nov. 24, 2008).
,
Mode of Access: Internet from the USGS web site. Address as of 11/24/08: http://pubs.er.usgs.gov/djvu/OFR/1981/ofr%5F81%5F690.djvu; current access available via PURL.
Sprache:
Englisch