Sentence:  New Product Introduction for Small Business Owners , 30 cents ; Developing and Selling New Products , 45 cents ; U.S. Government Purchasing , Specifications , and Sales Directory , 60 cents , are available from the Superintendent of Documents , <WSD>U.S.</WSD> Government Printing Office , Washington 25 , D.C. . 
Meaning of the word marked with <WSD> tags:  any number of entities (members) considered as a unit