@book{69267,
	author = {RAJU, V T                                                    and  OPPEN, M von},
	title = {Marketing margins and price correlations as measures of marketing efficiency for important crops in semi-arid tropical I},
	year = {1980},
	series = {International Crops Research  Institute For the Semi-Arid  Tropics ICRISAT Economic  program.  }
}