RT Journal Article SR Electronic T1 On Norbert's test plate and the striae of diatoms JF American Journal of Science JO Am J Sci FD American Journal of Science SP 12 OP 17 DO 10.2475/ajs.s2-31.91.12 VO s2-31 IS 91 A1 Sullivant, W. S. A1 Wormley, T. G. YR 1861 UL http://www.ajsonline.org/content/s2-31/91/12.abstract AB