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A progression for generating variable-interval schedules1 1This work was conducted as part of a program of research supported by Grant M-2433 from the National Institute of Mental Health. This article has been cited by other articles in PMC.Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (250K), or click on a page image below to browse page by page. |
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