by James R. Saltvold
About the Book
Perpetual calendars are a fascinating way to look at time, and can be defined in a variety of ways. In a comprehensive how-to manual, James Saltvold shares valuable insight on how to use his unique concepts to...
-
https://m.media-amazon.com/images/I/71nfNqFsBBL._SY466_.jpg
-
View
-
Hide