Patera, Alan: Clarke, Tom :Robinson, David Bruce books & textbook
La Posta: A Journal of American Postal History: June-July, 1990, Volume 21, Number 3, Whole No. 123
Patera, Alan: Clarke, Tom :Robinson, David Bruce; Helbock, Richard W. & Munshowe Maps, Sketches, b/w Illus
Richard W. Helbock /1990T Paperback
