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1ā- Brooks, Richard A., 1931-Ngā marau “...Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716....”
I whakaputaina 1964
Pukapuka -
2ā- Nadler, Steven M., 1958-Ngā marau “...Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716....”
I whakaputaina 2010
Pukapuka