@book{30431,
	author = {Popper, Karl},
	title = {Two fundamental problems of the theory of knowledge},
	publisher = {Routledge},
	year = {2013},
	address = {London},
	note = {3420 28/01/2019 APD17/1049491 23/02/2017 Ch. Ranbir Singh Institute of Social and}
}