Inventions
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- Focus of36
- Inventions -- Encyclopedias
- Inventions -- United States -- Marketing -- Corrupt practices
- Inventions -- Great Britain -- History
- Inventions -- United States -- History -- 20th century
- Inventions -- United States -- Anecdotes
- Inventions -- Biography -- Juvenile literature
- Inventions -- Juvenile poetry
- Inventions -- United States -- Popular works
- Inventions -- Drama
- Inventions -- Handbooks, manuals, etc
- Inventions -- China -- History -- Comic books, strips, etc
- Inventions -- United States -- History -- 20th century -- Juvenile literature
- Inventions -- Amérique du Nord -- Ouvrages pour la jeunesse
- Inventions -- North America -- Juvenile literature
- Inventions -- United States -- Patents -- Handbooks, manuals, etc
- Inventions -- United States -- History -- 19th century
- Inventions -- China -- History -- Juvenile literature
- Inventions -- United States -- History -- Juvenile miscellanea
- Inventions -- United States -- Marketing
- Inventions -- United States -- Periodicals
- Inventions -- Popular works
- Inventions -- Africa -- Juvenile literature
- Inventions -- United States -- History -- 19th century -- Juvenile literature
- Sub focus of26
- TECHNOLOGY + Inventions
- Inventions + Marketing
- Inventions + Economic aspects -- Handbooks, manuals, etc
- Inventions + History -- Comic books, strips, etc -- Juvenile literature
- Inventions + History -- Anecdotes
- Inventions + Social aspects -- Juvenile literature
- Inventions + Design and construction
- Inventions + History -- To 1500 -- Juvenile literature
- Inventions + Government policy -- United States
- Inventions + History -- 20th century
- Inventions + History -- Encyclopedias -- Juvenile literature
- Inventions + History -- Popular works
- Inventions + Social aspects
- Inventions + History -- 20th century -- Juvenile literature
- Inventions + History -- Encyclopedias
- Inventions + Study and teaching (Elementary)
- Inventions + History -- Pictorial works
- Inventions + History -- 19th century -- Juvenile literature