AGRI 120: Agriculture in Today's Society: Books

Controlled vocabulary legislate the use of predefined, authorised terms that have been preselected by the designer of the vocabulary, in contrast to natural language vocabularies, where there is no restriction on the vocabulary.

Subject headings are a controlled vocabulary. A single term or phrase is determined by an authority (Library Congress or a database vendor) to describe a subject. For example, try searching for the subject "roaring twenties" in West-Cat and see what you get.

Library of Congress Subject Headings (LCSH)

Sample Library of Congress Subject Headings

• Animal genetic engineering
• Animals, Genetically Modified.
• Biotechnology.
• Genetic engineering.
• Genetic Engineering--ethics.
• Genetically modified foods.
• Plants, Genetically Modified.
• Transgenic plants.
• 
  

• animals genetic engineering

WorldCat

One of the databases available from FirstSearch. Bibliographic records of any type of material cataloged by OCLC member libraries. Includes manuscripts written as early as the 12th century. Includes 52 million bibliographic records. If you learn how to use this tool, you will be able to tap into a huge amount of bibliographic information, including many historical documents. Use the Library of Congress Subject Headings to refine searches. To find primary sources, use the subject headings "sources." WorldCat has its own ILL function that works in conjuction with ILLiad. Very easy to initiate a request.