Theory of Computation
OR
Automata
John C Martin
http://www.mediafire.com/?3qrnmhgzwzm
TCS_Hopcroft_Motwani_Ullman
http://www.mediafire.com/file/z2zmi224rny/TCS_Hopcroft_Motwani_Ullman_1.pdf
http://www.mediafire.com/file/oryynzt1tnn/TCS_Hopcroft_Motwani_Ullman_2.pdf
http://www.mediafire.com/file/kffgjymdq2t/TCS_Hopcroft_Motwani_Ullman_3.pdf
http://www.mediafire.com/file/omf2jikmymm/TCS_Hopcroft_Motwani_Ullman_4.pdf