Astronomy
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- Astronomy + Experiments
- Astronomy + Religious aspects
- Astronomy + Philosophy
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- Astronomy + Religious aspects + Christianity
- Astronomy + Research
- Astronomy + Religious aspects + Catholic Church
- Astronomy + Vocational guidance
- Astronomy + History + To 1500
- Astronomy + Study and teaching + Activity programs
- Astronomy + History
- Astronomy + Religious aspects + Christianity + History
- Focus of20
- Astronomy -- Observers' manuals
- Astronomy -- Juvenile literature
- Astronomy -- Popular works
- Astronomy -- Juvenile films
- Astronomy -- Songs and music -- Juvenile films
- Astronomy -- Juvenile fiction
- Astronomy -- Observations
- Astronomy -- Comic books, strips, etc
- Astronomy -- Observations -- Drama
- Astronomy
- Astronomy -- Periodicals
- Astronomy -- Miscellanea -- Juvenile literature
- Astronomy -- Pictorial works
- Astronomy -- Miscellanea
- Astronomy -- Amateurs' manuals
- Astronomy -- Fiction
- Astronomy -- Observers' manuals -- Juvenile literature
- Astronomy -- Biography -- Juvenile literature
- Astronomy -- Charts, diagrams, etc
- Astronomy -- Drama
- Sub focus of15
- Astronomy + History
- Astronomy + History -- Juvenile literature
- Astronomy + Study and teaching + Activity programs -- Juvenile literature
- Astronomy + Religious aspects + Catholic Church
- Astronomy + Research -- Juvenile literature
- Astronomy + History + To 1500
- Astronomy + Religious aspects
- Astronomy + Vocational guidance -- Juvenile literature
- Astronomy + Religious aspects + Christianity + History -- Juvenile literature
- Astronomy + History + Study and teaching + Activity programs -- Juvenile literature
- Astronomy + Religious aspects + Christianity
- Astronomy + Experiments -- Juvenile literature
- Astronomy + History -- 20th century
- Astronomy + History -- 19th century
- Astronomy + Philosophy