Your search results will be displayed as listings of titles of articles or books (citations), displaying as much information as possible about the publication with regards to copyright regulations. When we have the copyright to share the whole publication or the abstract we do so through the clickable title. When we do not have the copyright we advise you to bring the citation to your local library for assistance in finding the whole publication.

The most recent publications are displayed first in alphabetical order in regards to the author(s).

Use this page to view lists of citations grouped by their subject type. When you first visit to the Browse page you will see a list of Preselected Citations. These are citations that have been highlighted by the National GAPs Program as being important. To view other citations first choose a subject from the Browse Subjects drop-down menu (click on the box with the "Preselected citations" text and pick one of the options that drops down). Second choose the type of citation from the Reference Type drop-down menu (click on the box with the "Preselected citations" text and pick one of the options that drops down). Click on the Show Documents button once you have made your selection and the list will be updated.

Reference Types
You will find three reference type options in the drop-down menu.

• All: All available documents in the database matching your search.
• Extension: These are documents that have been written and published through Extension programs at universities all over the US.
• Research: These are documents that have been published in scholarly journals.

1. Use meaningful words. Words such as "the" "at" and "like" will not improve your results. In fact the search engine ignores words less than 3 characters.
2. Remember that the search engine will attempt to find references with any of the keywords you entered, not all of the keywords you entered. Use the Advanced Search form for the latter.
3. If you want to search for an exact phrase, use the Advanced Searches.
4. Do not use any keywords with spaces in them. For example if you enter, E. Coli, the search engine will only look for the "Coli" because it will think that "E." is a separate word and it ignores words less then 3 characters long.

1. You can join multiple keywords with the AND, OR and NOT operators. For example, if you are looking for documents about both compost and sanitation, type compost in the first box, choose AND from the first drop-down menu, and then type sanitation in the second box.
2. You can also search for entire phrases by enclosing the phrase in double quotes.

1. You can manually type the following expressions into the text box at the bottom of the page.
   
   •  +  A leading plus sign indicates that this word must be present in each row that is returned.
   •  -  A leading minus sign indicates that this word must not be present in any of the rows that are returned.
     Note that you cannot just provide the '-' operator without also specifying keywords that you do want returned.
     The search phrase '-bacteria' will NOT return all the references that do not contain the word 'bacteria'.
   •  ( )  Parentheses are used to group words into subexpressions. Parenthesized groups can be nested.
   •  "  A phrase that is enclosed within double quote (.".) characters matches only rows that contain the phrase literally, as it was typed.
   •  *  The asterisk serves as the truncation operator. Unlike the other operators, it should be appended to the word to be affected.
     For example typing +(e* coli) would match 'E. coli', 'e coli', and 'Escherichia coli'.
   • No Operator  By default (when neither + nor - is specified) the word is optional, but the rows that contain it are rated higher.
2. You cannot search for all references that do not contain a specific word. You have to also specify a word that the reference does contain.
3. You cannot use words like "and", "or", and "not". You must use the symbols explained in bullet point number #1 as the operators.
4. If you only know the first or last part of a word, then use an asterisk '*' as a wild card. For example typing +(e* coli) would match 'E. coli', 'e coli', and 'Escherichia coli'.