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Cover for Georg Ferdinand Helm · The Principles of Mathematical Chemistry (Paperback Book) (2023)

The Principles of Mathematical C... (2023)

Georg Ferdinand Helm

Cover for Georg Ferdinand Helm · Principles of Mathematical Chemistry (Book) (2022)

Principles of Mathematical Chemi... (2022)

Georg Ferdinand Helm

Cover for Georg Ferdinand Helm · Die Lehre Von der Energie (Book) (2022)

Die Lehre Von der Energie (2022)

Georg Ferdinand Helm

Cover for Georg Ferdinand Helm · The Principles of Mathematical Chemistry: The Energetics of Chemical Phenomena (Paperback Book) (2018)

The Principles of Mathematical C... (2018)

Georg Ferdinand Helm

Cover for Georg Ferdinand Helm · Die Theorien Der Elektrodynamik Nach Ihrer Geschichtlichen Entwickelung (Paperback Book) [Large Print, German, Lrg edition] (2008)

Large Print, German, Lrg edition

Die Theorien Der Elektrodynamik ... (2008)

Georg Ferdinand Helm

Cover for Georg Ferdinand Helm · Die Theorien Der Elektrodynamik Nach Ihrer Geschichtlichen Entwickelung (Hardcover Book) [Large Print, German, Lrg edition] (2008)

Large Print, German, Lrg edition

Die Theorien Der Elektrodynamik ... (2008)

Georg Ferdinand Helm