1 Subjects: “...Theory of music and musicology...”

2 Subjects: “...Politische Theorie...”

3 Subjects: “...regality theory...”

4 Subjects: “...regality theory...”

5 Subjects: “...critical theory...”

6 Subjects: “...community well-being;ecological sustainability;personal happiness;positive change theory...”

7 Subjects: “...complexity theory; information and communication technologies (ICTs); media ecology; media...”

8 Subjects: “...critical theory...”

9 Subjects: “...Theory...”

10 Subjects: “...history of critical theory...”

11 Subjects: “...play theory...”

12 Subjects: “...: epistemology and theory of knowledge...”

13 Subjects: “...set theory...”