Acknowledgments

The Measurement Services Division would like to thank David G. Shaw and Mark Salomon for their advice during the planning and development of the database, especially in regard to the content of the database. Thanks, too, to Andrzej Maczynski for his interest in the data and his help with methods to make data available for revision. We'd also like to extend our thanks to Malcolm W. Chase, who provided a great deal of support throughout the creation of the online database.

Finally, we cannot fail to acknowledge those who did the demanding tasks of data entry and review: Reena Agarwal, Jennifer Chou, Meiliang Lee, Jennifer Maggi, Renu Senjalia, Constance Seymour and Mary A. Sullivan.