Cosmos sulphureus Cav. is more tolerant to lead than copper and chromium in hydroponics system
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M. Zafar | M. Iqbal | S. Yousaf | A. A. Khan | I. Nawaz | T. Butt | C. R. Mirza | G. Farooq | N. Aftab | K. Saleem | J. Hussain | A. Tahir | A. Khan