Description
Published:1996-
Item Description:Address: National Park Service, WASO-NRID, P.O. Box 25287 Denver, CO 80225-0287.
Title from cover.
No longer distributed to depository libraries in a physical format.
Some vols 1996-<1999> issued to depository libraries on microfiche; no longer distributed to depository libraries in a physical format.
Physical Description:volumes : illustrations ; 28 cm.
Issued also in a CD-ROM ed.
Some issues also available via Internet from the NPS web site (PDF only). Address as of 1/31/2000: http://www2.nature.nps.gov/pubs/yir/guidelines.htm ; current access available via PURL.
Publication Frequency:Annual