1 These are research materials that are necessary to perform research. 2  All inventions, discoveries and knowledge can become research tools. 3  Universities and public research institutions have many resources that can be considered research tools.
Waldo, Kansas. Waldo is a city in Russell County, Kansas, United States. As of the 2010 census, the city population was 30. Contents.
Waldorf, MD. Sponsored Topics. Waldorf, Maryland, is a town of nearly 70,000 residents about 20 miles from downtown Washington, D.C. The location makes Waldorf both a bedroom community of the nationâs capital and a commercial hub for southern Maryland.