Various methods are :
1. Emperical methods
i. Group Index method
ii. CBR methods
2. Semi emperical methods
3. Theoretical method
i. Burmister two layer theory
ii. Burmister three layer theory
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Various methods are :
1. Emperical methods
i. Group Index method
ii. CBR methods
2. Semi emperical methods
3. Theoretical method
i. Burmister two layer theory
ii. Burmister three layer theory
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