Crain's Petrophysical Handbook

Quotation from their homepage:

“Online Shareware Petrophysics Training and Reference Manual.”

Our Comment:

A great source of up-to-date information from E. R. (Ross) Crain, P.Eng. and Consulting Petrophysicist and Professional Engineer with more than 50 years of experience.

The Website:

https://www.spec2000.net/01-index.htm