McGraw-Hill Encyclopedia of Science & Technology: An international reference work in fifteen volumes including an index (new york McGraw-Hill Book Company, 1971)
McGraw-Hill Encyclopedia of Science & Technology: (vol-1, vol-2, vol-3, vol-4, vol-5, vol-6, vol-7, vol-8, vol-9, vol-10, vol-11, vol-12, vol-13, vol-14, vol-15, Index-1971)