id	domain	url
issue-656	doi.org	https://doi.org/10.30525/2256-0742/2019-5-2-221-225
issue-656	dash.harvard.edu	https://dash.harvard.edu/bitstream
issue-656	www.ibiblio.org	https://www.ibiblio.org/ml/libri/s/smitha_wealthnations_p.pdf
issue-656	openknowledge.worldbank.org	https://openknowledge.worldbank.org