Barker, Philip. "Effects of wood fragment mulches and differential supplies of nitrogen on the growth and chemical composition of Feijoa sellowiana, Ligustrum japonicum, and two clones of Chrysanthemum morifolium /." Doctoral dissertation, Ohio State University, 1966. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486725362005246Chicago Manual of Style (17th edition)