Those are usually just separate chapters scanned in from original order booklets or product handbooks/catalogs. The stuff that tends to be available are the more common components, the parts that were carried forward for a number of years or were iterated upon.
The chapter you came across seems to be excerpted from the 1981 Component Data Catalog, one of several sets which have been archived whole on this site:
http://www.bitsavers.org/components/intel/_dataBooks/
Some of the later revisions (8237A/8237-5, 8257, etc) can be found in the more recent entries, such as the 1985 edition.