%0 Book %A Langer, William H. and Glanzman, V. M. %I United States Government Printing Office %D 1993 %C Washington, DC %D 1993 %G English %B US Geological Survey circular Public issues in earth science %~ Universitätsbibliothek "Georgius Agricola" %T Natural aggregate: building America's future %Z https://katalog.ub.tu-freiberg.de/Record/0-1115711652 %U https://katalog.ub.tu-freiberg.de/Record/0-1115711652