https://groups.csail.mit.edu/mac/users/gjs/6.945/sdf.tgz
not just downloading the course's source code!
lithpers have to wait for a 55$ book and dedicated delivery from amazon with their pwecious dedicated GUIDE FOR LARGE ENTERPRISE SCHEME PROGRAMMING leveraging meta-programming abilities of lisp-1 interpreter to deliver scalable e-business solution architectures that seamlessly integrate with legacy infrastructure and take their platform to the next level.