 In 1993, the company acquired Glendale-based Interurban Press, a publisher of books primarily about streetcars, interurbans and trolley buses, in business since the 1940s.Initially, Pentrex continued publication of books and all of the magazines it had acquired from Interurban Press, but these were gradually phased out, as the company concentrated on production and sales of videos and, later, DVDs.The last magazines published by Pentrex were "RailNews" (ISSN 1091-2436) (formerly "Pacific RailNews", ) and "Vintage Rails", the final issues of which were those dated August 1999 and September/October 1999, respectively.