1. 1) W.T.M.Johnson, Ofiicial Dig., 33, 1489 (1961)
2. 2) E.G.Shur, ibid, 23,867 (1951)
3. 3) T.Yoshida, T.Sato, andT.Tanaka J.Paint Technology, 39,194 (1967)
4. 4) T.Sato, T.Tanaka, and T.Yoshida, J.Polymer Sci., PartB, 5,947 (1967)
5. 5) J.R.Patterson, Am.Paint J., 32, 88 (1948)