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1ā- Buroker, Jill Vance, 1945-Ngā marau “...Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716 Influence....”
I whakaputaina 1981
Pukapuka -
2ā- Barber, W. H. (William Henry)Ngā marau “...Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716 Influence....”
I whakaputaina 1955
Pukapuka