Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Shashi ranjan sinha
The books of Dips academy are comparetively better than others for previous year questions and their solutions. They publish two volumes, pure mathematics volume and applied mathematics volume. But what I found in it is that few CSIR questions are not mentioned or solved in the book. However, it is a nice book and it provides you very good topic wise summary as well