Abstract

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References
1.
Stone, H.
Journal of Cellular Plastics (Jan./Feb. 1983 ).
2.
Kreter, P E.
Journal of Cellular Plastics (Sept./Oct. 1985 ).
3.
Kane, R.
Journal of Cellular Plastics (Jan. 1965 ).
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Dwyer, F.
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6.Ibid [1].
7.Ibid [5].
8.Ibid [3].
9.Ibid [4].
10.Ibid [2].
11.Ibid [3].
12.Ibid [4].
13.Ibid [1].
