"The Way to Nirvāṇa" by Louis de La Vallée-Poussin (1917).
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The Way to Nirvāṇa : Louis de La Vallée-Poussin : Free Download, Borrow, and Streaming : Internet Archive
The Way to Nirvāṇa.By L. de La Vallée Poussin, professeur à l'Université de Gand.Six Lectures on Ancient Buddhism as a Discipline of Salvation.Hibbert...Internet Archive