Note: Each book in this series includes a list of all previously published entries in the series. According to this list, the Williamson bibliography is number 10 in the series. However, the primary verifier's (Hauck) copy doesn't show any sign of belonging to the series. Most editions include the sub-title (actually, sub-sub-title) "A Working Bibliography", which is not included in the titles and publications listed here unless: (1) There is no other sub-title; ''or'' (2) A variant of that phrase (such as "An Interim Bibliography") has been used.