@book{44335,
	author = {India. Ministry of Labour},
	title = {Annual survey of industries 1980-81},
	publisher = {Labour Bureau},
	year = {1980},
	address = {Chandigarh},
	note = {Detailed industry- wise report on earnings and labour cost in rubber, petroleum, coal, chemical and non-metallic mineral products (from industry 300 to 329 as per National Industrial Classification, 1970}
}