Which one of the following sentences is correct?

Mohamed Abdelghany @Mohamed_Abdelghany4

07 July 2015 0 6K Report

Hi,

Please, I want to know Which one of the following sentences is correct?

Epidemiological studies about zoonotic brucellosis and new trials for studying the effect of xx material on bacteria

Epidemiological studies on zoonotic brucellosis and new trials for studying the effect of xx material on bacteria

Epidemiological studies of zoonotic brucellosis and new trials for studying the effect of xx material on bacteria.

Thank you so much

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