Brands and Their Companies
--Reference Stacks-- HD 69 B7 .C662 (2 vol. & suppl.)
Broadcasting & Cable Yearbook
--Reference Stacks-- HE 8689 .B77
Companies and Their Brands
--Reference Stacks-- HD 69.B7 .C66 (2 vol.)
Who Owns What. From the Columbia Journalism Review's website, a directory of major media companies and the brands that they own.
MediaPost Directories. Free directory, representing all media types.
KFTV. "Search engine for international production services" for film, television, and commercial shoots.