1
Published [1981]
...APA 10...

Report Number(s): APA 10 APA 84 APA 297 APA 1327 SUS 56

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2
Published April 12, 1981
...APA 56...

Report Number(s): APA 56

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3
Published [1981]
...APA 1326...

Report Number(s): APA 1326 SUS 56

Link to full text