New Providence, N.J.--R.R. Bowker, a provider of bibliographic information, announced Tuesday that it has acquired Stamford, Conn.-based Simba Information Inc., the market intelligence and forecasting unit of Primedia Inc. Financial terms of the agreement were not disclosed. R.R. Bowker is a unit of privately held Cambridge Information Group. Simba Information produces newsletters and analytical reports for educational, business/professional and directory publishers.