( ZIPSKINNY) was created as a Web development "hobby" project using Census 2000 data obtained from the (US) Census website. While every effort has been made to ensure the accuracy of the information, errors and omissions can occur, and visitors are encouraged to use the actual Census site instead of this one for any serious research.

... there are certain important limitations to the data presented (in ZIPSKINNY). Because many of the measurements are based on sample data, certain results may be skewed in some cases, especially when the ZIP code area in question represents a very small sample. Please bear in mind that ZIP codes are not uniform population units. They were invented for mail delivery, not population comparisons.

A good place to start is with their Reference Tools section:

This section contains lists of reference tools for news librarians such as a list of essential books for U.S. news library, links to Web sites, finding expert sources on the Web and newspaper archives on the Web.

About The Pinakes:

In ancient times, the Library of Alexandria was seen as a universal store of human knowledge. As the Library grew in size, however, it became increasingly difficult to locate relevant material. The poet Callimachus solved the problem by compiling a catalogue called The Pinakes. On a far smaller scale, these Web pages hope to provide a similar function for Internet resources, by linking to the major subject gateways.

Also see THE INTERNET RESOURCES NEWSLETTER

The DLF Collections Registry is a collaboration among the University of Illinois Library, and the Digital Library Federation, a consortium of libraries and related agencies that are pioneering the use of electronic-information technologies to extend collections and services.

"The LoveTo Know Free Online Encyclopedia is based on what many consider to be the best encyclopedia ever written: the eleventh edition of the Encyclopaedia Britannica, first published in 1911. While many of the science and health articles are obviously outdated, much of the biographical and historical articles is more complete and in-depth compared to those available elsewhere. At a time when many encyclopedias have capsulated and condensed important knowledge, the 11th edition is generally much more in-depth and thorough on its topics. It is not uncommon for its entries to be 5 to 10 times the length of other encyclopedias. As a research tool, this 11th edition is unparallelled - even today. LoveToKnow is now giving you all these thousands of entries, preserving the treasured entries that make it so unique, and where necessary and possible adding the current point of view. We hope that you enjoy and learn from the LoveToKnow Free Online Encyclopedia and that it becomes one of your favorite places for reference information.

The Eleventh Edition filled 29 volumes and contains over 44 million words. It contains over 40,000 articles written by over 1,500 authors within their various fields of expertise. What was particularly remarkable was that many of the entries were written by the most famous people of the age. As such, it was considered to represent the sum of human knowledge at the beginning of the 20th Century. 

(The) website and project are not related to the current Encyclopeaedia Britannica, Inc. other than it being based on its 1911 Edition."