Analysis of information sources in references of the Wikipedia article "Côca (cây)" in Vietnamese language version.
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(trợ giúp)A Stepan laboratory in Maywood, N.J., is the nation's only legal commercial importer of coca leaves, which it obtains mainly from Peru and, to a lesser extent, Bolivia. Besides producing the coca flavoring agent for Coca-Cola, Stepan extracts cocaine from the coca leaves, which it sells to Mallinckrodt Inc., a St. Louis pharmaceutical manufacturer that is the only company in the United States licensed to purify the product for medicinal use.
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