Private CompanyFounded: 1911Sales: $317 million (2003)NAIC: 511120 Periodical Publishers; 511130 Book Publishers; 422920 Book, Periodical, and Newspaper Wholesalers; 451211 Book Stores; 511210 Software Publishers.
Private Company Incorporated: 1947 as Katafaga Estates Ltd.
Public Company Incorporated: 1940 as Industrial Gas Equipment Co.