1
Published [1980?]
...SUS 336...

Report Number(s): APA 1323 SUS 336

Link to full text
2
Published [1981]
...SUS 56...

Report Number(s): APA 1326 SUS 56

Link to full text
3
4
Published [1985]
...SUS 513...

Report Number(s): APA 2921 (draft) SUS 513

Link to full text