00313naa a2200109 a 450000100080000000500110000800800410001910000200006024500520008026000090013277300620014118396642010-01-10 1974 bl --- 0-- u #d1 aBERINGER, J. E. aR factor transferer in Rhizobium leguminosarum. c1974 tJournal of General Microbiologygv. 84, p. 188-198, 1974.