Human Resource Management in the Pornography IndustryDavid M. Kopp · First published 2020Open the Tome
Powerful Prayers for Your MarriageDavid Kopp, Heather Kopp · First published 2004RomanceOpen the Tome
Chromatic transformations in nineteenth-century musicDavid Kopp · First published 2002 · Latest edition 2003Open the Tome
