[
1.. Pettersen, E. L.: Agronomy Jour. 44 (1.952) 332.
]Search in Google Scholar
[
2. Pettersen, E. L., and Naylor, A. W.: Am. Soc. Plant Physiol. Abstract Papers, Ithaca, 1.952, p. 22.
]Search in Google Scholar
[
3· Tso, T. C.: Nature 202 (1964) 511.
]Search in Google Scholar
[
4· Steffens, G. L., Tso, T. C., and Spaulding, D. W.: Ag. and Food Chem. 1.5 (1.967) 972.
]Search in Google Scholar
[
5· Tso, T. C., Burk, L. G., and Steffens, G. L.: Tob. Science 1.0 (1.966) 77·
]Search in Google Scholar
[
6. Burstrom, H.: Physiologia Plantarum 2 (1.949) 197.
]Search in Google Scholar
[
7· Margot, L.: Mem. Soc. Vaudois Sci. Nat. 1.1 (1.956) 277·
]Search in Google Scholar
[
8. Al-Ani, T. A., and Seltmann, H.: Tob. Science 10 (1966) 59· 9· Gentner, W. A., and Burk, L. G.: Weed Science 1.6 (1.968) 259·
]Search in Google Scholar