The phrase "a logical source of" is correct and usable in written English.
It can be used when discussing the origin or basis of a particular idea, argument, or phenomenon that is rational or reasonable.
Example: "The research provided a logical source of evidence to support the hypothesis."
Alternatives: "a rational basis for" or "a reasonable origin of".
I felt that enforced chastity would be a logical source of comedy: wouldn't Terri get itchy?
The income derived from labor was plentiful, easily identifiable, and readily replenished, making it a logical source of tax revenue.
He was a logical source of expertise, having won a couple of Pulitzers for his work around the world, though in this case my interest was more specific to his skills.
Umbilical cord blood is a "logical source" of stem cells that could travel to damaged parts of the brain, says neurologist Evan Snyder of Harvard Medical School in Boston.
The cerebrospinal fluid (CSF) is a logical source of potential AD biomarkers, as it reflects biochemical changes in the brain.
Mutant proteins arising from these mutations are a logical source of tumour-specific antigens that could account for both the presence of increased TILs and the better prognosis associated with an MSI-High phenotype.
Most of the stuff I would want to know would probably be more from a nutritional, preventative point of view and that I would think of more of a dietitian or something as a logical source to go for that type of thing as opposed to a pharmacist.
Now, if the United States balks at offering modern weaponry to the Saudis, China would again be a logical source.
One logical source of help would be historians and philosophers of science, as well as the specialists in our universities in programs called "Science, Technology and Society".
Japanese disdain for others is directed most strongly at other Asians, who would be the most logical source of future immigration.
The most logical source of power for Germany will be natural gas.
