The gnomonical quality of Greek and Roman sundials : a study about the conical type / Jan Kragten ; in cooperation with: Ruud Hooijenga and Fer de Vries
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The gnomonical quality of Greek and Roman sundials : a study about the conical type / Jan Kragten ; in cooperation with: Ruud Hooijenga and Fer de Vries
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The gnomonical quality of Greek and Roman sundials : a study about the conical type
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The gnomonical quality of Gree ...... uud Hooijenga and Fer de Vries