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Authors whose works are in public domain in at least one jurisdiction

List of works by Hermann August Hagen

Bibliotheca Entomologica: Die Litteratur Über Das Ganze Gebiet Der Entomologie, Bis Zum Jahre 1862

1862 bibliography by Hermann August Hagen

Die Neuroptera der Insel Cuba ⬇️

Monograph of the North American Astacidae / by Dr. Hermann A. Hagen ⬇️

Cambridge: [University Press: Welch, Bigelow & co.]: 1870.

Monograph of the North American Astacidæ. ⬇️

Cambridge[University Press: Welch, Bigelow, & Co.]1870.

Monographie des caloptérygines ⬇️

Bruxelles et Leipzig, C. Muquardt, 1854.

On some insect deformities / by Hermann A. Hagen ⬇️

Cambridge [Mass.]: University Press, 1876.

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