TY - JOUR T1 - The pharmacognosy and the research and development of herbal medicine: seeking the necessary approach JO - Revista Brasileira de Farmacognosia A1 - Marques, Luis Carlos SN - 0102-695X UL - 10.1590/S0102-695X2012000100001 VL - 22 Y1 - 2012 PB - Brasil ER -