TY - GEN AU - Beattie, J M AU - Lamb C A, Bentley O G TI - Trace elements : proceedings of the conference held at the Ohio agricultural experiment station Wooster, Ohio, October 14-16,1957 U1 - 581.133 56 LAM CY - Newyork, Academic Press Inc. KW - Trace elements/micronutrients/photosynthesis ER -