Rathwell, P. JamesPurcell, Wayne D.2021-12-092021-12-091972-10B-704https://hdl.handle.net/20.500.14446/332009The Oklahoma Agricultural Experiment Station periodically issues revisions to its publications. The most current edition is made available. For access to an earlier edition, if available for this title, please contact the Oklahoma State University Library Archives by email at libscua@okstate.edu or by phone at 405-744-6311.application/pdfThe researcher assumes full responsibility for conforming with the laws of copyright. Whenever possible, Special Collections and University Archives will provide information about copyright owners and related information. Securing permission to publish or use material is the responsibility of the researcher. Note that unless specifically transferred to Oklahoma State University Libraries, any applicable copyrights may be held by another individual or entity. Copyright for material published by Oklahoma Agricultural and Mechanical College/Oklahoma State University is held by the Board of Regents for the Oklahoma Agricultural and Mechanical Colleges. All rights reserved. Further information about copyright policy can be obtained by contacting Special Collections and University Archives by email at libscua@okstate.edu or by phone at 405-744-6311.Bulletin