No longer distributed to depository libraries in a physical form, <1996->
Title varies slightly.
Description based on: 1979 prelim.; title from caption.
Some issues available via the Internet at the USGS web site. Address as of 1/28/04: http://minerals.usgs.gov/minerals/pubs/commodity/mis.html#G; current access available via PURL.
Microfiche. <1992 prelim.-> [Washington, D.C.] : Supt. of Docs., U.S. G.P.O. microfiches : negative.