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- [4] BOHLOOL BB, 1973, B ECOL RES COMM STOC, V17, P336
- [6] The accurate determination of nitrates in soils [J]. INDUSTRIAL AND ENGINEERING CHEMISTRY, 1924, 16 : 180 - 183
- [7] Schmidt E. L., 1973, "Modern Methods in the Study of Microbial Ecology". Bulletins from the Ecological Research Committee. Sweden, V17, P67