I bought it yesterday at a thrift shop at Fullerton, Halsted, and Lincoln in Chicago.
I bought it because it was the month of my birth. Also included new map of Viet Nam, Cambodia, Laos, and Thailand, which was, of course, somewhat in flux during that time period.
I am going to cut the map into book-size pages and stencil poems on them that focus on shifting geographies and the nature of truth.