[1. Bush, L. P., Sims, J. L., and Atkinson, W. 0.: Can. J. Plant Sci. 50 (1970) 289.10.4141/cjps70-054]Search in Google Scholar
[2. Day, E. W., Golab, T., and Koons, J. R.: Anal. Chem. 38 (1966) 1053. 10.1021/ac60240a024]Search in Google Scholar
[3. Hoagland, D. R., and Amon, D. I.: Calif. AES Circular 347 (1938). ]Search in Google Scholar
[4. Irvine, W., and Saxby,M.: Phytochem. 8 (1969) 473· 10.1016/S0031-9422(00)85450-3]Search in Google Scholar
[5. Krasaesindhu, P.: Master of Science Thesis, University of Kentucky, 1969.]Search in Google Scholar
[6. Neurath, G., Krull, A., Pirmann, B., and Wandrey, K.: Beitr. Tabakforsch. 3 (1966) 571. ]Search in Google Scholar
[7. Richardson, M.: Nature 197 (1963) 290.10.1038/197290a0]Search in Google Scholar
[8. Smith, H. H.: Adv. in Genetics 14 (1969) 1. ]Search in Google Scholar
[9. Steiner, M., and Kamienski, E. S. von: Naturwiss. 40 (1953) 483.10.1007/BF00628992]Search in Google Scholar
[10. Kamienski, E. S. von: Planta 50 (1957) 315.10.1007/BF01938621]Search in Google Scholar
[11. Yasumatsu, N., and Akaike, S.: Nippon Noegi. Kagaku. Kaishi. 39 (1965) 347·10.1271/nogeikagaku1924.39.347]Search in Google Scholar