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G. Osthoff, A. Hugo, P. van Wyk, M. de Wit, and S. Meyer
Pág. 169 - 178
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Daleen van der Merwe, Garry Osthoff, Apie J Pretorius
Pág. 1046 - 1056
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Daleen van der Merwe, Garry Osthoff, Apie J Pretorius
Pág. 1115 - 1124
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William P. Dubé, Steven S. Brown, Hans D. Osthoff, Maya R. Nunley, Steven J. Ciciora, Mark W. Paris, Richard J. McLaughlin, and A. R. Ravishankara
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Osthoff, H. D. Jager, W. Walls, J. van Wijngaarden, W. A.
Pág. 46 - 53
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Osthoff, H; Anderson, J B; Johannesson, R; Lin, C-F
Pág. 831 - 838
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