THE CLASSIFICATION, IDENTIFICATION AND NOMENCLATURE OF AGROBACTERIA - INCORPORATING REVISED DESCRIPTIONS FOR EACH OF AGROBACTERIUM-TUMEFACIENS (SMITH AND TOWNSEND) CONN 1942, AGROBACTERIUM-RHIZOGENES (RIKER ET AL) CONN 1942, AND AGROBACTERIUM-RUBI (HILDEBRAND) STARR AND WEISS 1943