Robinson, Edward. "Herbicide studies : I. The relation of 2,4-dichlorophenoxyacetic acid to pHand organic matter of soils ; II. Alpha-alpha-dichloropropionic acid and 3-amino-1,2,4-triazode as herbicide on Johnsongrass /." Doctoral dissertation, Ohio State University, 1956. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486392916692684Chicago Manual of Style (17th edition)