Large global variations in measured airborne metal concentrations driven by anthropogenic sources oleh Jacob McNeill, Graydon Snider, Crystal L. Weagle, Brenna Walsh, Paul Bissonnette, Emily Stone, Ihab Abboud, Clement Akoshile, Nguyen Xuan Anh, Rajasekhar Balasubramanian, Jeffrey R. Brook, Craig Coburn, Aaron Cohen, Jinlu Dong, Graham Gagnon, Rebecca M. Garland, Kebin He, Brent N. Holben, Ralph Kahn, Jong Sung Kim, Nofel Lagrosas, Puji Lestari, Yang Liu, Farah Jeba, Khaled Shaifullah Joy, J. Vanderlei Martins, Amit Misra, Leslie K. Norford, Eduardo J. Quel, Abdus Salam, Bret Schichtel, S. N. Tripathi, Chien Wang, Qiang Zhang, Michael Brauer, Mark D. Gibson, Yinon Rudich, Randall V. Martin