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Abstract

This article is a supplement to my 2012 article in the Transactions. In the last few years research has answered some of the questions I raised in the original article, and has uncovered some ambiguities that may require further study. I shall follow a similar format to the original article, but list only the laces which need updating due to new information.

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Creative Commons Attribution-Noncommercial 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial 4.0 License

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New Prairie Press

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