TY - RPRT TI - Valve morphology and systematic position of Navicula walkeri (Bacillariophyceae), a diatom endemic to Oregon and California (USA) AU - J.P. Kociolek AU - S. A. Spaulding AU - J.C. Kingston PY - 1998 DO - 10.1127/nova.hedwigia/67/1998/235 UR - https://pubs.usgs.gov/publication/70021344 ID - 70021344 ER -