1
by Ballard, Warren B.
Published [1980]

Report Number(s): APA 524 APA 947

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2
by Ballard, Warren B.,
Published 1978.

Report Number(s): APA 917

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3
Published 1978.

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

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