These pages are still under development. The use of data base software is currently beyond the scope of this web site-- however, material will be prepared. The data downloaded from international sites often requires considerable manipulation before it can be used in data bases. Those interested in data bases can search information on Microsoft Access or LibreOffice Base for relatively simple applications while open source software such as MySQL is available for professional projects. See Data Issues for information on some of the problems facing users of international data.