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Bertrand, G. (1912a). Sur l'extraordinaire sensibilite de Y Asper- 

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Bertrand, G. (19126). Sur le role capital du manganese dans la produc- 

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Bertrand, G. (1940). Importance du molybdene comme oligoelement 

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Bertrand, G. and Javillier, M. (1911a). Influence combinee du zinc 

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Bertrand, G. and Javillier, M. (19116). Influence du manganese sur 

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