1601
1602
1605
1606
by Davis, Jeffrey C.
Published [2002]

Report Number(s): APA 4135

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1608
by Ballard, Warren B.,
Published 1978.

Report Number(s): APA 917

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1609
1610
1612
by Ballard, Warren B.
Published [1980]

Report Number(s): APA 524 APA 947

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1613
1619
by Hettinger, Loren.
Published 1974.

Report Number(s): APA 529

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