Huppes, Gjalt Quantified Eco-Efficiency [electronic resource] An Introduction with Applications by Gjalt Huppes and Masanobu Ishikawa - Dordrecht Springer 2007 http://dx.doi.org/10.1007/1-4020-5399-1 ISBN: 1402053991 Dewey Class. No.: 333.7 / (e-book)