Anthem guide to the art galleries and museums of EuropeOlivia Petrides, Anthem Press · First published 2007 · Latest edition 2009Open the Tome
Trees of the California Sierra NevadaGeorge A. Petrides, Olivia Petrides · First published 2001Open the Tome
Trees of the Rocky Mountains and intermountain westGeorge A. Petrides, Olivia Petrides · First published 2000Open the Tome
