Formula Desk refrence

[kaartman]

My friend from Pakistan has asked me for help to search for a desk refrence for formulas, he has a sheet metal workshop that do gelatine cutting, hydraulic bending of sheet goods and tubing as
well as sheet rolling. Some of his work include tank manufacturing of diffrerent shapes. Can someone please recomment a book that that I can buy for him.
Internet connection is limited for him so he cannot use the all the nice calculators than are available online

[Castone]

What type do you need, that is the type of work I do. I may be able to help you some.

[kaartman]

Hallo Leo
Thank you for the reply, I was wondering if there is a desk reference available in book format or even “how to” for sheet metal profession. My friend said he has too much trial and error before het get the job done right,
He has difficulty when it comes to bending and rolling of sheet and tubing, I guess what I am looking for is book titles that the western world would use to study from. I have seen books on Amazon but is more towards restoration and serious custom work.