An Introduction to the Theory of Strings
Michael E. Peskin · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 1985
These lectures present, from an introductory perspective, some basic aspects of the quantum theory of strings.They treat (1) the kinematics, spectrum, and scattering amplitude of the bosonic string, (2) the spectrum and supersymmetry of Green-Schwarz superstring, and (3) the identification of the underlying gauge invariances of the string theory.