Библиография
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Table I. List of sources searched, periods covered, and of the approximate total number of entries available in each source

Database

Period Covered

Approximate Number of Records

ABC-Clio, Inc., Art Literature

1974-1980

28, 000

American Institute of Physics

1975-1980

114, 000

Biological Abstracts and Bioresearch Index

1969-1980

2, 600, 000

Chemical Abstracts

1967-1980

4, 362, 000

Comprehensive Dissertation Abstracts

1861-1980

648, 000

Excerpta Medica

1974-1980

1, 160, 000

Historical Abstracts

1973-1980

54, 000

Institute for Scientific Information (Science and Technology)

1974-1980

2, 970, 000

Institute for Scientific Information (Social Sciences)

1972-1980

765, 000

Language and Language Behavior Abstracts

1973-1980

33, 000

Modern Language Association Bibliography

1976-1980

121, 500

Philosopher's Index

1940-1980

81, 300

Public Affairs Information Service International

1972-1980

107, 000

Psychological Abstracts

1967-1980

305, 500

Science Abstracts

1969-1980

1, 404, 000



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