The manual provides detailed graphic and text-based criteria for various aspects of housing:
The ADA was signed in July 1990. The "90 upd" likely includes the draft or very first ADA guidelines. Thus, it shows 32" clear door openings (the modern standard is 32" min, but the 90s required 36" corridors leading to them). It is a forensic snapshot of regulatory change.
The full 1,114-page volume is frequently sought in digital formats for quick professional reference.
Once you obtain a PDF version: