@book{182074,
	author = {सिंह, संजय},
	title = {विज्ञान कैलेण्डर:},
	publisher = {एस.पी.कौशिक इंटरप्राइजेज},
	year = {2020},
	address = {दिल्ली},
	edition = {2020}
}