Subjects: Machinery; Science—History; TechnologyTECHNOLOGY & ENGINEERING / Machinery; SCIENCE / History; TECHNOLOGY & ENGINEERING / History
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Subjects: Technology; History; Science—HistoryTECHNOLOGY & ENGINEERING / History; SCIENCE / History; TECHNOLOGY & ENGINEERING / Mechanical
Subjects: Arts; Literature; Science--HistorySCIENCE / History; ART / General; HISTORY / General
Subjects: Mathematics; History; Science—HistoryMATHEMATICS / History & Philosophy; SCIENCE / History; SCIENCE / Philosophy & Social Aspects
Subjects: Science—Philosophy; Science—History; Physics—PhilosophySCIENCE / Philosophy & Social Aspects; SCIENCE / History; SCIENCE / Physics / General
Subjects: Mathematics; History; Science—HistoryMATHEMATICS / History & Philosophy; SCIENCE / History
Subjects: Science; Snow; WeatherSCIENCE / History; HISTORY / Social History; NATURE / Weather
Subjects: Humanities; History; Naturopathy--United States--History--20th centuryMEDICAL / History; HEALTH & FITNESS / Naturopathy; MEDICAL / Alternative & Complementary Medicine
Subjects: History; Anthropology; Mechanical engineeringTECHNOLOGY & ENGINEERING / Mechanical; BIOGRAPHY & AUTOBIOGRAPHY / Cultural & Regional; HISTORY / General