FWIW, I have the "Honda CB750 Gold Portfolio". As an obsessed CB750 memorabilia collector, I also have some of the original magazines whose articles were reprinted in the book. One day I decided to cross check them, and with great surpirse I found that some of them are incomplete in the book.
The reprint is a copy&paste in the traditional sense. The original articles were split in columns, sometimes with advertising included. The editors of the book cut the columns to make them fit into pages, but if an article needed some extra lines, they didn't use the next page. They simply.... drop that extra espace altogether, or some previous one until the article could be fit exactly into the pages assigned.
Raul