BLM Library Tutorials

The BLM Library offers various tutorials to help users navigate library services and technologies (with more being added all the time).  

 These include:

Search Tips

Use the following tips and tools to maximize your search effectiveness with our research resources, including databases and journals. All BLM employees are encouraged to contact the BLM Library at for research assistance.

Tips for More Effective Searching

1. Formulate a search question. What information are you looking for?

Example: I am looking for recent articles on the habitat of the little pocket mouse.

2. Identify the key terms from your question.

Example: little pocket mouse and habitat

3. Identify any synonyms or related terms to include.

Example: Perognathus longimembris, range, distribution, environment

4. Identify any terms you want to exclude from the search.

Example: Perognathus longimembris pacificus, east or eastern

5. Identify the limits of your search. Do you want to limit your search to one particular author or to a particular journal?

Example: journal articles, 2006-2012, terms to appear in abstract or in descriptors but not necessarily in title

6. Examine your search results and refine or broaden your search query.

Sometimes it is better to begin with a broader search and then refine it after you see what results you get. You can locate a citation from your search that most closely matches what you are looking for and use the descriptors (key words) from that citation to refine your search. Once you locate an article that matches what you are looking for, examine the literature cited by that article to identify more relevant articles, authors, journals, or key words.

Search Tools

1. Boolean Operators: AND, OR, NOT

AND - all terms must be present

  • Example: mouse AND habitat; results must have both terms

OR - either or both terms may be present

  • Example: mouse OR mice; results may have either mouse or mice or both

NOT - contains the first term but not the second

  • Example: mouse NOT rat; results will have mouse but not rat

Use parentheses to combine operators.

  • Example: (mouse OR mice) AND habitat; results will have the term(s) mouse and/or mice as well as the term habitat

2. Exact phrases: all of the words must be present in the exact order listed within quotation marks

  • Example: "little pocket mouse"

3. Truncation or wild card

Each database uses its own symbol for truncation. The most common is the asterisk (*). Truncation is used to get derivatives of a word or words containing specified letters. It indicates that one or more characters is missing. It can be used if you are unsure of the spelling, want to include plural forms, or want all forms of a word or all words that include the specified letters.

  • Example: habitat* will pull up habitation and habitats; wa*n will pull up warn, warden, washington, etc.

Each database uses its own symbol for wild cards. The most common is the question mark (?). Wild cards are used to indicate the possible absence of one character anywhere in the word except at the beginning.

Example: M?cDonald will retrieve both McDonald and MacDonald


Library Services

The BLM Library, located at the National Operations Center in Denver, exists to serve BLM employees across the country. We also are able to assist members of the general public who seek BLM publications and information. We are the BLM's only full-service library with professional staff. 

Questions? Want to request an item? Contact the BLM Library or visit the Library FAQ.