https://taxfoundation.org/louisiana-tax-plan-bad-deal/
http://www.leveragesalt.com/blog/2017/4/louisianas-gross-receipts-tax-proposal-so-good-not
https://taxfoundation.org/louisiana-gross-receipts-tax/
https://taxfoundation.org/louisiana-scraps-gross-receipts-tax-proposal/
http://www.taxrates.com/blog/2017/05/02/louisiana-may-keep-temporary-sales-tax-increase/