Complex sentence: The Pergamon World Atlas (in English, 1968) was originally prepared by the Polish Army Topographical Service and published as the "Atlas Świata" (World Atlas) in 1962.
Split into simpler sentences: The Pergamon World Atlas (in English, 1968) was originally prepared by the Polish Army Topographical Service. It was published as the "Atlas Świata" (World Atlas) in 1962.