The principles of biology - Spencer, Herbert, 1820 -1903 (D. Appleton, 1897)

The principles of biology - Spencer, Herbert, 1820 -1903 (D. Appleton, 1910)

The principles of biology - Spencer, Herbert, 1820 -1903 (D. Appleton, 1896)

The principles of biology - Spencer, Herbert, 1820 -1903 (D. Appleton and Company, 1866)

The principles of biology - Spencer, Herbert, 1820 -1903 (D. Appleton and company, 1898)

The principles of biology - Spencer, Herbert, 1820 -1903 (D. Appleton and company, 1896)

The principles of biology, by J. I. Hamaker - Hamaker, John Irvin, 1869 - (P. Blakiston, 1913)

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Prinzipien der generellen Morphologie der Organismen. Wörtlicher Abdruck eines Teiles der 1866 erschienen Generellen Morphologie (allgemeine Grundzüge der organischen Formen-Wissenschaft, mechanisch begründet durch die von Charles Darwin reformierte Deszendenz-Theorie) - Haeckel, Ernst, 1834 -1919 (G. Reimer, 1906)

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