Deletion of Roark's Formulas for Stress and Strain - Seventh Edition

Comment: I imagine this lack of coverage by  must be endemic to many handbook articles. Look for example at the ASHRAE Handbook. I don't see any other sources covering this article other than the publisher's. The Roark manual is clearly notable because of its widespread use. Academic notability is harder to establish because a manual of formulas is, by definition, not an academic book. But that's the problem faced by many, if not all, manuals. Maybe we can change the book notability guidelines to reflect this
Stance: keep
Cited policy: Wikipedia:Reliable sources (WP:RS)