III · Science
A normative survey of planetarium directors in the United States and Canada to determine current practices in adult education and opinions regarding selected adult learning principles
Subjects
Planetariums · Astronomy · Adult education · Study and teaching
Language
ENG
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![Cover of [William Wheeler Hubbell, authorized to apply for patents.] by United States. Congress. Senate. Committee on Patents](/img/cover/10200621-M.jpg)
