The helpful Planning Advisory Service Reports published by the American Planning Association and its predecessors have been a part of just about every planning department library in the United States since 1949. Every month, the APA places a "new" historic PAS Report on their web site, free for all visitors to view and download. If you read only one, make it the political incorrect No. 15: Self-Service Gasoline Stations from 1950, packed full of mid-century sexism and site planning advice that would make a modern planner recoil in horror. Or fall to the floor in laughter.
American Planning Association Historic PAS Reports: http://www.planning.org/pas/reports/historic.htm