@book{82843,
	author = {Ausubel, Jesse. and ebrary, Inc.},
	title = {Technological trajectories and the human environment},
	publisher = {National Academy Press,},
	year = {1997.},
	address = {Washington, D.C. :},
	note = {"National Academy of Engineering."},
	url = {http://site.ebrary.com/lib/strathmore/Doc?id=10041129}
}