1 Subjects: “...Design / Human factors / http://id.loc.gov/authorities/subjects/sh2002004502...”

2 Subjects: “...main controlling factors...”

3 Subjects: “...controlling factors...”

4 Subjects: “...controlling factors...”

5 Subjects: “...controlling factors...”

6 Subjects: “...controlling factors...”

7 Subjects: “...controlling factors...”

8 Subjects: “...influencing factor analysis...”

9 Subjects: “...Q-factor...”

10 Subjects: “...split factor...”

11 Subjects: “...double forgetting factors...”