id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
crl-10508	Blanchard, J. R.	Agricultural Research and the Exchange Problem	1950	8	.pdf	application/pdf	7550	553	81	T h e r e are three aspects of the exchange problem—the exchange of duplicates, do- mestic exchange and foreign exchange. T h e r e are some organ- izations, of course, who operate on such a slender financial margin that it would be impossible for them to supply free copies of their literature.	cache/crl-10508.pdf	txt/crl-10508.txt