?url_ver=Z39.88-2004&rft_id=10.1063%2F1.4757461&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Mahinder+Singh%2C+B.S.&rft.aulast=Mahinder+Singh&rft.aufirst=B.S.&rft.title=Development+of+two-axis+sun+tracking+system&rft.date=2012&rft.issn=0094243X&rft.isbn=9780735410947&rft.genre=proceeding