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MacFadyen A., 1963, SOIL ORGANISMS, P3
[12]
Newell P. F., 1967, P413
[13]
POCHON J, 1962, TECNIQUES ANALYSE MI
[14]
POSTGATE JR, 1971, CHEMISTRY BIOCHEMIST
[15]
QUISPEL A, 1974, BIOLOGY NITROGEN FIX
[16]
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[17]
Satchell J. E., 1967, pUnpaginated
[18]
WOOD EJF, 1965, MARINE MICROBIAL ECO, P110
[19]
[No title captured]