1. Aliev, R. A., Zvyagintsev, D. G., and Kozhevin, P. A.: 1975, Moscow Univ. Soil Sci. Bull.
30, 1.
2. Beynon, K. I., Hutson, D. H., and Wright, A. N.: 1973, Residue Rev.
47, 55.
3. Cervelli, S., Nannipieri, P., Giovannini, G., and Perna, A.: 1975, Pest. Biochem. Physiol.
5, 221.
4. Cervelli, S., Nannipieri, P., Giovannini, G., and Perna, A.: 1976, Weed Res.
16, 365.
5. Cervelli, S., Nannipieri, P., Giovannini, G., and Perna, A.: 1977, Soil Biol. Biochem. in press.