P. Lounesto: Clifford algebras and spinors. Cambridge UP, 1997, (2nd ed.) 2001.
I.R. Porteous: Clifford algebras and the classical groups. Cambridge UP, 1995.
D. Hestenes, G. Sobczyk: Clifford algebra to geometric calculus. Reidel, 1984/1987. 
B. Jancewicz: Multivectors and Clifford algebra in electrodynamics. World Scientific, 1988. 
I.M. Benn, R.W. Tucker: An introduction of spinors and geometry
   with applications in physics. Adam Hilger, 1987.
J. Snygg: Clifford algebra, a computational tool for physicists. Oxford UP, 1997.
F.R. Harvey: Spinors and calibrations. Academic Press, 1990.
P. Budinich, A. Trautman: Spinorial chessboard. Springer, 1988.

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Matrix representations of Clifford algebras are on pages:
   Lounesto 217, Porteous 155, Benn&Tucker 36,40, Harvey 208, Snygg 300-301.

The Maxwell equations (in the language of Clifford algebras) are on pages:
   Lounesto 108,110, Jancewicz 76,279, Benn&Tucker 255, Snygg 140. 

The Dirac equation (in the language of Clifford algebras) is on pages:
   Lounesto 144,180, Benn&Tucker 284, Snygg 172.

Lorentz transformations in terms of Clifford algebras (SO+(3,1) = SL(2,C)/Z_2):
   Lounesto 126,128, Hestenes&Sobczyk 106, Snygg 308-322.

Spin groups (= two-fold covering groups of rotation groups):
   Lounesto 224, Porteous 159, Benn&Tucker 79, Harvey 272, Hestenes&Sobczyk 104.

Matrix representations of automorphism groups of scalar products of spinors:
   Lounesto 236-242, Porteous 162-163, Benn&Tucker 75-75,78-79,
   Harvey 248,251,256-257, inner cover page.

Conformal transformations in n-dimensions (in terms of Clifford algebras):
   Lounesto 246,250, (Hestenes&Sobczyk 210,286).

Cauchy's integral formula in n-dimensions (in terms of Clifford algebras):
   Lounesto 265-266, Hestenes&Sobczyk 263,265.