The Wikipedia Ivory Trade page gives a detailed history.
https://en.wikipedia.org/wiki/Ivory_trade
The Born Free Foundation’s website on the ivory trade.
https://www.bornfree.org.uk/ivory-trade
The World Wildlife Fund help stop ivory trade website.
https://www.wwf.org.uk/updates/world-elephant-day-help-stop-ivory-trade
Fauna & Flora International website – A beginners guide to ivory trade.
https://www.fauna-flora.org/news/a-guide-to-ivory-trade
A recent Independent article on an attempt to re-open global trade.
