4
5
Published 1977.

Report Number(s): APA 3363

Link to full text
6
8
9
Published [2013]

Report Number(s): SuWa 30

Link to full text
10
Published [2012]

Report Number(s): SuWa 33

Link to full text
12
Published [1981]

Report Number(s): APA 334 APA 1221 SUS 14

Link to full text
13
14
Published [1982]

Report Number(s): APA 27 APA 329 APA 1220

Link to full text
15
Published 1978]

Report Number(s): APA 4164

Link to full text
16
Published [1981]

Report Number(s): APA 387 SUS 3

Link to full text
17
20
Published [2013]

Report Number(s): SuWa 4

Link to full text