In April 1970, the BioSciences Information Service of Biological Abstracts, the Chemical Abstracts Service, and Engineering Index, Inc. began a five-part study to determine the relationships between and the overlap in coverage in their printed publications and computerreadable services. This study was designed to provide information needed by these three accessing services for planning future cooperative programs and for reconciling differences in policies and practices so as to make their publications and services more useful toIn April 1970, the BioSciences iformation Service of Biological Abstracts (BIOSIS) , the Chemical Abstracts Service (CAS), and Engineering Index, Inc. (Ei) announced a joint five-part study with the following objectives:
.To determine the amount of overlap among the lists of primary journals each of the services regularly monitors.
2.To find out how the same journal articles are selected for analysis by more than one of the three services. 3. To study differences in the editorial policies and procedures employed by the three services as they relate to the form, the format, and the content of bibliographic descriptions and abstracts.
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