E. F. Hurt and L. N. & M. Williams. Handbook of the Private Local Posts. Billig's Specialized Catalogues 6, USA 1950.
This book always leads to some confusion as most collectors thing it is part of the 44 volume handbook run by Billig, however, it is from a complete different series and called “specialist catalogue” and not handbook.
On 168 pages, the catalog lists local stamps world wide, most of them not listed anywhere and is a must for the serious local stamp collector.
