RT Journal Article SR Electronic T1 FUNDAMENTAL CLASSIFICATION OF GALLS JF Science JO Science FD American Association for the Advancement of Science SP 469 OP 470 DO 10.1126/science.57.1477.469-b VO 57 IS 1477 A1 Wells, B. W. YR 1923 UL http://science.sciencemag.org/content/57/1477/469.3.abstract AB