Vignan ane Yantra Vidhya Kosh.: bhugol (Gujarati)
shah, V. C.,
Vignan ane Yantra Vidhya Kosh.: bhugol (Gujarati) - Ahmedabad Gujarat Univtrsity 1982
Vignan ane Yantra Vidhya Kosh.: bhugol (Gujarati) - Ahmedabad Gujarat Univtrsity 1982