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Yandri, Yandri and Suhartati, Tati and Hadi, Sutopo (0214) The Chemical Modification of Cellulase from Locale Bacteria Isolate Bacillus subtilis ITBCCB148 with Glyoxylic Acid. JOURNAL OF PURE AND APPLIED MICROBIOLOGY, 8 (5). pp. 3675-3680. ISSN Online ISSN: 2581-690X