Nafta Wiki is on-line public knowledge database on terminology, theory, methodology and practical cases in Petroleum Engineering.
SPE PetroWiki – Society of Petroleum Engineers
AAPG Wiki – American Association of Petroleum Geologists
SPE Petroleum Abbreviations
Crain's Petrophysical Handbook by E. R. (Ross) Crain, P.Eng., online at www.spec2000.net, 2018