Information Retrieval and Machine Translation. Advances in Documentation and Library Science, volume III, part I.
Interscience Publishers, NY 1960 first edition; 686 pages, some illustrations and photographs; index.
Interscience Publishers, NY 1960 first edition; 686 pages, some illustrations and photographs; index.
Plenum Press, NY and London, 1969; 351 pages, Index.
Plenum Press, NY and London, 1972; 330 pages, Index.
Plenum Press, NY 1970, second printing 1972; 354 pages. index, some diagrams.