44
by Ballard, Warren B.,
Published 1978.

Report Number(s): APA 917

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46
47
49
54
56
57
Published [1982]

Report Number(s): APA 416 APA 1335 SUS 116 SUS 117

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58
Published 1978.

Report Number(s): APA 1613 RTS 4 SUS 35 SUS 10004 SUS 10005

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59
Published 1952-1965.

Report Number(s): APA 4109

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