GU: http://jeremybolton.georgetown.domains/courses/cs/

UT: http://www.cs.utexas.edu/users/fussell/cs310h/

UT Stacks: http://www.cs.utexas.edu/users/fussell/cs310h/lectures/Lecture_14-310h.pdf

GU Subroutines activation records: http://jeremybolton.georgetown.domains/courses/cs/COSC121_L2h_LC3_Subroutines_STACK.pdf