The Encyclopedia Americana Ensiklopedia sosialisme /S. Surjountoro New standard encyclopedia / editor in chief, Douglas W. Downey An Encyclopedia of world history / Willvan Z. Longer Ensiklopedia populer politik pembangunan Pancasila /A. Heuken ... [et al.] Natuurkundige Verhandelingen Van De Hollandsche MaatschappijThe encyclopedia of classical mythologyMcGraw-Hill encyclopedia of science & technologyA Dictionary of twentieth century world biography / consultant editor, Asa Briggs ; editor, Alan Isaacs, Elizabeth Martin, David PickeringThe Encyclopedia Americana :international edition /editors, Patricia Bayer ... [et al.]