1
Published [1981]
...SUS 81...

Report Number(s): APA 3310 SUS 81

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2
Published [1981]
...SUS 80...

Report Number(s): APA 1210 SUS 80

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3
4
Published [1982]
...SUS 79...

Report Number(s): APA 5 APA 287 APA 1340 APA 1582 SUS 79

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5