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Book research help: rate of tech adoption

It’s a long shot on a holiday weekend here in the U.S., but I’m trying to find good sources for the following:

1. Comparative rates of adoption for radios, televisions, PCs, Internet and cell phones from 1950-present.
2. U.S. Data as well as world or by-country data on #1

I’ve found a few sources here and there, but about 80% of the magazine and web material that mentions this data fails to provide any source references, which kind of sucks.

All pointers welcome (Web, book, journals, whatever). Cheers.