K. Fatima, K. Shirin, M. A. Kalhoro, M. Qadiruddin, and Y. Badar, “?? ? TRACE ELEMENTS IN INDIGENOUS MEDICINALPLANTs (RHAzYA STRICTA, VINCA ROSEA ANDFAGONIA CRETICA): Short Communication”, Pakistan Journal of Scientific & Industrial Research, vol. 42, no. 4, pp. 182–183, Aug. 1999.