@book{43984,
	author = {MANGAL, S. K.  and MANGAL, UMA},
	title = {PEDAGOGY OF SOCIAL SCIENCES /},
	publisher = {PHI Learning Pvt. Ltd., },
	year = {2018.},
	address = {New Delhi:},
	url = {https://books.google.co.in/books?id=TrRHDwAAQBAJ&newbks=1&newbks_redir=0&dq=nature+of+social+science&source=gbs_navlinks_s}
}