“… 1. This extensive literature, rich in formal theory, includes Clark and Lippitt (1978), Francis (1989), Hamm (1986, 321), Haynes (1900a; 1900b; 1900c; 1900d), Hyneman (1940), Jewell (1962), Jewell and Miller (1988), Jewell and Patterson (1986), Lewis (1952), Palmer (1964), Price and Bell (1970), Reinsch (1907), Rosenthal (1981), Stanley (1975), Winslow (1931), Zeller (1954). …”