@techreport{schwab14[TUW-229117], author = {Schwab, Oliver and Rechberger, Helmut}, title = {{E}rmittlung des {D}atenbedarfs f{\"u}r {N}ationale {R}ohstoffbilanzen - {T}eil 2: {E}rmittlung der {D}atenl{\"u}cken}, institution = {{E}226 - {I}nstitut f{\"u}r {W}asserg{\"u}te und {R}essourcenmanagement; {T}echnische {U}niversit{\"a}t {W}ien}, year = {2014} }