Columbia subject headings:
Illustration of books--Psychological aspects.
Learning, Psychology of.
Textbooks--Illustrations.
Visual learning.
Harvard subject headings:
Illustration of books--Psychological aspects.
Learning, Psychology of.
Textbooks--Illustrations.
Visual learning.
Princeton subject headings:
Illustration of books--Psychological aspects.
Learning, Psychology of.
Textbooks--Illustrations.
Visual learning.