MONO91 NIST Monograph 91: Automatic Indexing: A State-of-the-Art Report Appendix C: Selective Bibliography of Additional References appendix Mary Elizabeth Stevens National Bureau of Standards Lees, R. B., Automatic Generation of Natural-Language Sentences, in Mathematical Machines and Their Applications, Colloq. Foundation of Mathematics, Tihany, 1962, pp. 177-184 (Ahed. Kiado', Budapest, 1965). Lefkovitz, D., The Application of the Digital Computer to the Problem of a Document Clas- sification System, Proc. National Colloquium on Information Retrieval, Philadelphia, Pa., April 24-25, 1964, [OCRerr]d. B. F. Cheydleur, pp 133-146 (Spartan Books, Washington, D.C., 1965). Lefkovitz, D., Substructure Search in the MCC System, J. Chem. Doc. 8, No. 3, 166-173 (Aug. 1968). Lefkovitz, D. and N.S. Prywes, Automatic Stratification of Information, AFIPS Proc. Spring Joint Computer Conf., Vol. 23, Detroit, Mich., May 1963, pp. 229-240 (Spartan Books, Baltimore, Md., 1963). Lehmann, W. P., Computational Linguistics: Procedures and Problems, Rept. No. LRC- 65-WA-i, lv. (Linguistics Research Center, Texas Univ., Austin, Jan. 1965). Lehmann, W. P. and F. D. Pender graft, Development of a Linguistic Computer System, 85 p. (Linguistics Research Center, Univ. of Texas, Austin, June 1963). Lehman, W. P. and F. D. Pendergraft, Development of a Linguistic Computer System, 33 p. (Linguistics Research Center, Univ. of Texas, Austin, Aug. 1964). Lehmann, W P. and F. D. Pendergraft, Machine Language Translation Study, Quarterly Progress Rept. No. 11, Nov. 1, 1965 - Jan. 31, 1966, 121 p. (Linguistics Research Center, Univ. of Texas, Austin, May 1966). Lemmon, A., Automatic Identification of Phrases for Document Classification, in Informa- tion Storage and Retrieval, Rept. No. ISR-5 [G. Salton, Proj. Dir.] pp. 11-1 to 11-27 (Computation Lab., Harvard Univ., Cambridge, Mass., Jan. 1964). LeSchack, A. R., The Determination of Clusters by Matrix Analysis, in Information Storage and Retrieval, Rept. No. ISR-7 [G. Salton, Proj. Dir.] pp. XIV-1 to XIV-43 (Computation Lab., Harvard Univ., Cambridge, Mass., June 1964). LeSchack, A. R., A Note on Measures of Similarity, in Information Storage and Retrieval, Rept. No. ISR-7 [G. Salton, Proj. Dir.] pp. XIII-1 to XIII-16 (Computation Lab., Harvard Univ., Cambridge, Mass., June 1964). Lesk, M. F., Operating Instructions for the SMART Text Processing and Document Retrieval System, in Information Storage and Retrieval, Rept. No. ISR-11 [G. Salton, Proj. Dir.] pp. lI-i to 11-63 (Cornell Univ., Ithaca, N.Y., June 1966). Lesk, ME., Performance of Automatic Information Systems, Inf. Stor. & Retr. 4, No.2, 201-218 (June 1968). Lesk, M. E., Word-Word Associations in Document Retrieval Systems, in Information Storage and Retrieval, Rept. No. ISR-13 [G. Salton, Proj. Dir.] pp. IX-1 to IX-52 (Cornell Univ., Ithaca, N.Y., Jan. 1968). Lesk, M. F., Word-Word Associations in Document Retrieval Systems, Am. Doc. 20, No. 1, 27-38 (Jan. 1969). 266