.

this is a very good survey on symmetry groups and condensed matter :

https://www.epj-conferences.org/articles/epjconf/pdf/2012/04/epjconf_cscm2012_00006.pdf

(pretty dense, however)

and this is a gentler introduction to space groups, somewhat oldschool (hand-drawings, no fancy animations and the like) but it has everything you need as an introduction

http://folk.uio.no/ravi/cutn/scm/symmetry_and_crystallography/Compendium_H_Fjellvag_Crystallography.pdf

.

Thank you very much 

1. For understanding and denoting space groups, you may refer:

https://bruceravel.github.io/demeter/artug/atoms/space.html

 http://pd.chem.ucl.ac.uk/pdnn/symm3/sgintro.htm

2. Three-dimensional space groups:

https://www.uwgb.edu/dutchs/SYMMETRY/3dSpaceGrps/3dspgrp.htm

http://pd.chem.ucl.ac.uk/pdnn/symm3/allsgp.htm

3. point groups, space groups and crystal structure 

http://folk.uio.no/ravi/cutn/scm/symmetry_and_crystallography/Compendium_H_Fjellvag_Crystallography.pdf

4. Lattices and Space-Group Theory

file:///C:/Users/user/Downloads/9781461439561-c1.pdf

5. Integrated space-group and crystal structure determination

http://journals.iucr.org/a/issues/2015/01/00/sc5086/sc5086.pdf

6. Crystallographic Space Group Symmetry Tables

http://homepage.univie.ac.at/nikos.pinotsis/spacegroup.html

Hope this will be of some help to you.

Regards, 

Rebika Rai

Thank you very much for this useful information. @Rebika 

@ Vishesh Saxena..U r welcome..!!