I've taken a drop for NEET 2017 & joined Aakash. Apart from NCERT and Aakash material, which good reference books should i refer to?

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well, well!!!! you've already joined AKASH. so focusing solely on their material and class notes will be more than enough for you.. according to me, don't waste your PRECIOUS time on any other book or material.. it will create confusion in your mind!! hope this will help you!