歸元直指 [Quy nguyên trực chỉ]. [Direct Path to Return to the Source]. [明命肆年歲次癸未 [1823] 冬月穀日 Minh Mệnh tứ niên tuế thứ Quý mùi - đông nguyệt cốc nhật]

This series was originally printed circa 2 separate books which were combined and rebound by EFEO, of which 1 [HN 0462] are found in the ISSI HN Hán Nôm collection. This digital series contains this book.