NaturaPhotographs by Paul C. KoppTiny Book InspirationalPaul C. Kopp · First published 2017Open the Tome
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
