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I can offer you the Yoga Vashishtha in Sanskrit with English translation. It is a set of four books. You will have to buy the set.
M
The following page contains all Sanskrit verses (and prose sections) connected to the English translation from your book. It also features an experimental grammatical analysis table and glossary section:
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तावान्सर्वेषु वेदेषु ब्राह्मणस्य
विजानतः .. २-४६..