In chronological order, the method of literature information retrieval adopts the retrieval system from far to near. This method can collect systematic documents of a certain discipline and is suitable for document retrieval of larger disciplines. For example, to know the initial age of a subject, we need to know the whole process of its development now, so we can use the sequential search method to start from the initial age and gradually find it in the near future.
(2) Backward search method
Reverse retrieval method is a method of literature retrieval by using retrieval tools from near to far, from new to old and from reverse time. This law focuses on recent literature. Using this method, you can get the latest information as soon as possible.
(3) Sampling method
Spot check method refers to the characteristics of the project, selects the most likely or most likely time period of document information related to the project, and uses retrieval tools to carry out key retrieval.
Search steps:
1. Analyze the topic and define the retrieval requirements.
This topic belongs to the category of public relations, and it is searched by using the comprehensive Chinese reference books for library majors published in recent years.
2. Select retrieval methods and tools.
First of all, understand the concept of public relations, and the interpretation of Ci Hai is more accurate and credible, so you can choose. Then, to understand the concept of the relationship between public libraries and private libraries, we can choose the authoritative American Library Association library and information science vocabulary.
3, familiar with retrieval tools, determine the retrieval method.
(1) Cihai uses the stroke index or Chinese Pinyin index to search for "Gong", followed by "Gong * * * relationship" and records the results, and finds the meaning of the related concept "public relations image".
(2) The American Library Association Library and Information Science Vocabulary uses the subject method to find out the explanation of "the relationship between public libraries and private libraries". "*" means multiple characters.