Hospitality and tourism marketingWilliam Lazer, Melissa Dallas, Carl Riegel · First published 2006Open the Tome
Hospitality and tourism careersCarl D. Riegel, Carl Riegel, Melissa Dallas · First published 1997Open the Tome
Ueber den Pemphigus der Erwachsenen mit Ausschluss des Pemphigus syphiliticusCarl Riegel · First published 1882Open the Tome
