User:HansVanLeunen
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Hans van Leunen is the initiator of https://en.wikiversity.org/wiki/Hilbert_Book_Model_Project https://en.wikiversity.org/wiki/User:HansVanLeunen
Hans van Leunen is the initiator of https://en.wikiversity.org/wiki/Hilbert_Book_Model_Project https://en.wikiversity.org/wiki/User:HansVanLeunen