@article{845831, author = {F. Williams and Lane Sander and Stephen Wise and J. Girard}, title = {Development and Evaluation of Methods for Development of Naphthodianthrones and Flavonoids in St. John s Wort}, year = {2006}, number = {1115}, month = {2006-05-19 00:05:00}, publisher = {Journal of Chromatography A}, language = {en}, }