Canaday, Craig. "Effects of fertilization and other factors on phytophthora rot of soybeans and on natural inoculum of phytophthora merasperma f. sp. glycinea in soil /." Doctoral dissertation, Ohio State University, 1983. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487238791268656Chicago Manual of Style (17th edition)