“…References to this variable can be found in the publications by Ruttan (1961) , Scharlach and Schuh (1962) , Ahmed and Parcher (1964), Edwards, et al (1964) , Herdt and Cochrane (_1966), Reynolds andTimmons (1969}, Wise andDover (1974) , Crowley (1974), and Walker (1976) . References to the variable can be found in publications by Ezekiel (1926), Wallace (l926), Edwards, et al (1964), Wise and Dover (1974), and Crowley (1974) .…”