Melamine plastic dinnerware from the 1950s - History and Information on 'melmac' dinnerware companies, patterns and collecting
Collecting Vintage Melmac Dinnerware: History and Information - A Hub page written by Cindy Fahnestock-Schafer
Melamine Dinnerware, All Things Plastic Fantastic, Welcome to Melmac Central - A blog by Retro Chalet
The Branchell Company - website of the melmac dinnerware manufacturer from the early 1950s into the 1960s.
PlasticLiving - Watertown Melmac History, Jon Hedu, and Early Airlines Plastic
Restaurantware : http://www.restaurantwarecollectors.com/forums/misc.php?do=page&template=rwcnhome
This includes "commercial" china -- made for use in diners, hotels, restaurants and eating places, lunch counters, and in general, heavyweight ware with logos on it (or not).