522
525
526
528
530
531
by Van Nieuwenhuyse, Erwin E.,
Published 1985.

Report Number(s): SUS 701

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533
Published 2010?]

Report Number(s): SuWa 217

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534
Published [1984]

Report Number(s): APA 1110

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535
536
Published [1980]

Report Number(s): APA 328 APA 1204

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537
538
Published [1982]

Report Number(s): APA 300 APA 1369

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539
Published [1982?]

Report Number(s): APA 138 SUS 71

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540
Published [1982]

Report Number(s): APA 423 APA 1438 APA 1439 SUS 70

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