The Planetarium, history, construction, operation
Subtitle: the Fels Planetarium of the Franklin Institute, Philadelphia, Pennsylvania
By: by Roy K. Marshall.
Publisher: Sky Pub. Corporation, Harvard College Observatory
Published: 1947
Place of publication: Cambridge, Mass
Language: eng
Number of pages: 17
Subjects: Fels Planetarium of the Franklin Institute (Philadelphia, Pennsylvania)
Notes: Cover title.