Please answer the following question: What type of details about david reigle  can be gathered from the following bio?  Bio: david reigle -lrb- august 22 , 1952 in danville , pennsylvania , us -rrb- is an american author and an independent scholar of the sanskrit scriptures of india and their tibetan translations . he has written on the buddhist kālacakra teachings , and has published research on the alleged sourcebooks accepted in theosophy . these are the `` books of kiu-te '' , i.e. , rgyud-sde , the tibetan buddhist tantras , and the so-called `` book of dzyan '' , which still remains unidentified .
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