@book{gerhardt1942,
	title = {Deutsche Roh- und Werkstoffe : [mit Bilderatlas Durch die deutsche Rohstoffwirtschaft]},
	address = {Knapp},
	annote = {423, 96 S},
	author = {{Hans} Gerhardt and {Albert} Höfner},
	edition = {3., erw. Aufl},
	howpublished = {Frankfurt a.M.},
	url = {http://gso.gbv.de/DB=2.1/CMD?ACT=SRCHA&SRT=YOP&IKT=1016&TRM=ppn+138634122&sourceid=fbw_bibsonomy},
	year = {1942},
	biburl = {http://www.bibsonomy.org/bibtex/27e31ca31621bdf4b8406dde646308e6a/fbw},
	description = {imported},
	keywords = {imported }
}