Robert Whittaker (1969). "New concepts of kingdoms or organisms. Evolutionary relations are better represented by new classifications than by the traditional two kingdoms". Science. 163 (863): 150–160. doi:10.1126/science.163.3863.150. PMID5762760.
Robert Whittaker (1969). "New concepts of kingdoms or organisms. Evolutionary relations are better represented by new classifications than by the traditional two kingdoms". Science. 163 (863): 150–160. doi:10.1126/science.163.3863.150. PMID5762760.