Using This Guide  Index Card           This section points out the specific features that identify each of his First Editions, including Harper's 'coding system' and also gives you information on Book Grading and Pricing Sources.   (CLICK on PAGES to ENLARGE)

Book Condition-1	Book Condition-2	Book Condition-3
Pricing Sources-1	Pricing Sources-2	Code Letters-1
Code Letters-2	Identification Points-1	Identification Points-2
Identification Points-3	Identification Points-4	Identification Points-5