Contingent valuation study of lost passive useRichard T. Carson, Robert C. Mitchell, W. Michael Hanemann, Raymond J. Kopp, Stanley Presser, Paul A. Ruud, San Diego. Department of Economics University of California · First published 1995Open the Tome
Experiments in General ChemistryThomas T. Huang, Richard W. Kopp, Jeff G. Wardeska · First published 1986Open the Tome
