files are provided in two formats: html pages or pdf files.
The pdf files may be accessed with Adobe Acrobat Reader. If
you do not have this software, you may download it at adobe.com.
you are unable to download and use these files, please
e-mail us, and we
will be happy to e-mail you the particular file you want. If
you need a particular study as a Microsoft Word document, or
as a text file, please e-mail us your request, with a description
of the specific usage you have in mind.
contact us for information about translating our materials.