Full reference OpenMind biblio ref
Al‐Ṭūsī, Naṣīr, and Badakhchani, and S. Badakhchani. 1998. “Contemplation And Action [Risālah‐I Sayr Wa Sulūk]”. London: I.B. Taurus; The Institute of Ismaili Studies.
{ Naṣīr Al‐Ṭūsī, and Badakhchani, S. Badakhchani, 1998 #330 }