Effect of inoculation with Azotobacter chroococcum on nitrogenase activity of Zea mays roots grown in agricultural soils under aseptic and non-sterile conditions - Martinez Toledo, M. V.; Gonzalez-Lopez, J.; Rubia, T.; Moreno, J.; Ramos-Cormenzana, A. (Springer, 1988)
http://dx.doi.org/10.1007/BF00257669
Keywords: W; TE-TZ; ZA-ZE