Editore: US Dept. of the Interior: Bureau of Mines, Washington, D. C., 1976
Da: Xochi's Bookstore & Gallery, Truth or consequences, NM, U.S.A.
Paper Back. Condizione: Near Fine. No Jacket. 29pp.; SC pale yellow w/blk.staple-bound(no title on spine); clean,tight pgs. Temperature increases on the heads of resin-grouted bolts as indicators of the integrity of the anchoring of the bolt. Report of Investigations (RI) 8178. illus., table.
Editore: US Dept. of the Interior: Bureau of Mines, Washington, D. C., 1976
Da: Xochi's Bookstore & Gallery, Truth or consequences, NM, U.S.A.
Paper Back. Condizione: Near Fine. No Jacket. 29pp.; SC pale yellow w/blk.staple-bound(no title on spine); clean,tight pgs. Temperature increases on the heads of resin-grouted bolts as indicators of the integrity of the anchoring of the bolt. Report of Investigations (RI) 8178. illus., table.