http://www.internalcombustionbook.com/

Website for Author and Book.
On History Detective they stated he has the most complete archives of Documents.
This shows that GM and Standard were buying up trolley lines which used clean energy and forcing conversion to Oil burning buses. The documents lead to conclusion that intent was to completely get rid of mass transit for sales of automobiles.
There was an antitrust ruling and a later federal investigation.

One book reviewer-
Internal Combustion provides a riveting, well researched, technically on-target, no-holds barred revelation of the factors that have brought us to today's crisis point--the world's reliance on oil. His compelling narrative detailing the evolution of what has become today's global dilemma is a must-read for the technically savvy as well as for the layman.
Melvin I. Olken, Editor-in-Chief
IEEE Power & Energy Magazine

also;
Research, Ugly Truth. Conventional wisdom says that Americans addicted themselves to oil and that the free market gives people the energy sources and technologies they most desire. Edwin Black proves that the truth is uglier. Based on prodigious research deep into the historical record, Black demonstrates that power-hungry despots, avaricious monopolists, and bottom-line obsessed corporate oligarchs have long done their best to control where we get our energy and how we use it. To better understand how we got where we are today and how we can make better energy choices in the future, read this page-turner.
David Farber, author
Sloan Rules: Alfred P. Sloan and the Triumph of General Motors