SIC and NAICS manuals
SIC - Standard Industrial Classification Manual
The Standard Industrial Classification Manual provides a listing of SIC codes with explanations. It also provides an alphabetical list of industries next to their SIC codes. [It is located in Willis Library General Reference, 1st floor, and at the Government Documents Service desk, 3rd Floor, Willis Library. It is also located at the UNT Dallas Library]. HF1042.S73 1987 [located in Willis Library General Reference]
NAICS (North American Industry Classification System) manual
This U.S.-designated 6 digit code replaces the older SIC code. It is the result of a joint effort by the U.S., Canada, and Mexico to classify industries so that statistics produced in the three countries will be comparable. Eventually the SIC codes will no longer be used, but right now the directories of companies and industries that you are using have ... HF1042.N67 [located in Willis Library General Reference and at the UNT Dallas Library]
Using Reference USA to get the industry SIC code
This is a "quick fix" showing how to use Reference USA to get an industry SIC code when you are having a difficult time determining it from the official SIC web site. But when you use this code later on, look carefully at the industry stats to make sure you are using the right code.