Standard Catalog of Firearms 7th Edition 1997
Standard Catalog of Firearms 7th edition from 1997: The Collector’s Price and & Reference Guide - Values of more than 12,000 guns. From The Publishers of Gun List by Ned Schwing and Herbert House - It appears Michael used this set of books for much of his reference on fine shotguns. Published by Krause Publications, Iola, WI. 1 unsigned copy available.