Check-in check-outGary K. Vallen, Jerome J. Vallen · First published 1996 · Latest edition 2013Open the Tome
Check in Check Out and Front Offc Opr and Adtg WbkGary K. Vallen, Jerome J. Vallen · First published 2009Open the Tome
Check-in, Check-out, Second Canadian EditionGary K. Vallen, Jerome J. Vallen, Gary Robinson · First published 2007Open the Tome
Host of OpportunitiesHubert B. Van Hoof, Gary K. Vallen, Marilyn E. McDonald, Paul J. Wiener · First published 2001Open the Tome
