1 Subjects: “...beauty masks...”

2 Subjects: “...disposable masks...”

3 Subjects: “...face mask...”

4 Subjects: “...face mask...”

5 Subjects: “...mask operation...”

6 Subjects: “...self-masking nanosphere lithography...”

7 Subjects: “...forest mask...”

8 Subjects: “...cloud masking...”

9 Subjects: “...Mask R-CNN...”

10 Subjects: “...cloud masking...”

11 Subjects: “...time-frequency (TF) mask...”

12 “... verständlichen Schreibstils mit wissenschaftlicher Tiefe hat auf dem Markt der angebotenen Bücher zur Botanik...”

13 “..." as a tradition? Or does apparent simplicity mask a complex and ultimately baffling obstacle...”