"You find one and it will be corrupt! The same doctors that wrote it will be glad to KILL you for your $$$."
This is unfair and easy to simply say.
I am not a fan of the medical establishment, let me tell you!
I know of the corruption and greed!! Indeed!
The pharmaceutical companies are proving that now very well!
Today's medical doctors do not study or understand diet and nutrition.
That's why I consider the source and seek doctors and studies with no such influence - as you do! (I also have books by other doctors such Ehret (fascinating) and would love to find more!!)
I would recommend reading "Nutrition and Physical Degeneration" by Dr. Weston Price, first published in 1939. (A pre-1950 medical book as you have mentioned).
He was not corrupt, in fact he went against the tide when the medical establisment was anti-fat and began to promote the lipid hypothesis (which has proven to be a very weak one).
With his own money he travelled around the world and studied natural, "uncivilized" societies and NATURAL diets.