Gregory Palamas. The Triads. Edited with an introduction by John Meyendorff. Translated by Nicholas Gendle. Preface by Jaroslav Pelikan.

Softcover, 172 pages. 
Publisher: Paulist Press, 1st Printed in 1983. 
Size: 6" x 9"  
ISBN: 978-0-8091-2447-3