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  1. By: Du Roi, Johann Philipp,
    Publication info: Helmstadii :Typis vidvae B.P.D. Schnorr,1771.
    Holding Institution: Harvard University Botany Libraries
  2. By: Du Roi, Johann Philipp, - Schaerrer, J. C., - Walwert, Jakob Samuel, - Walwert, Georg Christoph,
    Publication info: Braunschweig :im Verlage de Fürstl. Waisenhaus-Buchhandlung,1771-1772.
    Holding Institution: Harvard University Botany Libraries