For anyone interested in billboard reefers, there is a superb book written by Messrs. Hendrickson and Kaminski titled "Billboard Refrigerator Cars". The book is very thorough in its approach and discusses the development and history of the cars, builders and leasing companies associated with this endeavor. The text is accompanied by several hundred illustrations and the book makes for a fascinating read....highly recommended.
http://www.amazon.com/Billboar...ickson/dp/1930013221
Bob