Online Books by
R. J. Johnson
Books from the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Johnson, R. J.: Arsenic in agricultural ecosystems : a bibliography of the literature 1950 through 1971 (Dept. of Agronomy, University of Illinois, 1973), also by Robert L. Jones and T. D. Hinesly (page images at HathiTrust)- Johnson, R. J.: Barium in agricultural ecosystems : a bibliography of the literature 1950 through 1971 (Dept. of Agronomy, University of Illinois, 1973), also by Robert L. Jones and T. D. Hinesly (page images at HathiTrust)
- Johnson, R. J.: Boron in agricultural ecosystems : a bibliography of the literature 1950 through 1971 (Dept. of Agronomy, University of Illinois, 1973), also by Robert L. Jones and T. D. Hinesly (page images at HathiTrust)
- Johnson, R. J.: Cadmium in agricultural ecosystems : a bibliography of the literature 1950 through 1971 (Dept. of Agronomy, University of Illinois, 1972), also by Robert L. Jones and T. D. Hinesly (page images at HathiTrust)
- Johnson, R. J.: Cobalt in agricultural ecosystems : a bibliography of the literature 1950 through 1971 (Dept. of Agronomy, University of Illinois, 1973), also by Robert L. Jones and T. D. Hinesly (page images at HathiTrust)
- Johnson, R. J.: Iron in agricultural ecosystems : a bibliography of the literature 1950 through 1971 (Dept. of Agronomy, University of Illinois, 1974), also by Robert L. Jones and T. D. Hinesly (page images at HathiTrust)
- Johnson, R. J.: Lead in agricultural ecosystems : a bibliography of the literature 1950 through 1971 (Dept. of Agronomy, University of Illinois, 1973), also by Robert L. Jones and T. D. Hinesly (page images at HathiTrust)
- Johnson, R. J.: Mercury in agricultural ecosystems : a bibliography of the literature 1950 through 1971 (Dept. of Agronomy, University of Illinois, 1973), also by Robert L. Jones and T. D. Hinesly (page images at HathiTrust)
- Johnson, R. J.: Nickel in agricultural ecosystems : a bibliography of the literature 1950 through 1971 (Dept. of Agronomy, University of Illinois, 1973), also by Robert L. Jones and T. D. Hinesly (page images at HathiTrust)
- Johnson, R. J.: Selenium in agricultural ecosystems : a bibliography of the literature 1950 through 1971 (Dept. of Agronomy, University of Illinois, 1973), also by Robert L. Jones and T. D. Hinesly (page images at HathiTrust)
- Johnson, R. J.: Silver in agricultural ecosystems : a bibliography of the literature 1950 through 1971 (Dept. of Agronomy, University of Illinois, 1973), also by Robert L. Jones and T. D. Hinesly (page images at HathiTrust)
- Johnson, R. J.: Tin in agricultural ecosystems : a bibliography of the literature 1950 through 1971 (Dept. of Agronomy, University of Illinois, 1973), also by Robert L. Jones and T. D. Hinesly (page images at HathiTrust)
- Johnson, R. J.: Zinc in agricultural ecosystems : a bibliography of the literature 1950 through 1971 (Dept. of Agronomy, University of Illinois, 1972), also by Robert L. Jones and T. D. Hinesly (page images at HathiTrust)
- Johnson, R. J.: Zirconium in agricultural ecosystems : a bibliography of the literature 1950 through 1971 (Dept. of Agronomy, University of Illinois, 1973), also by Robert L. Jones and T. D. Hinesly (page images at HathiTrust)
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