Brode, Douglas. From Walt to Woodstock: How Disney Created the Counterculture . University of Texas Press, 2004. (For context on Disney’s 1970s output.)
Hough, John, director. Escape to Witch Mountain . Walt Disney Productions, 1975.
Telotte, J.P. The Mouse Machine: Disney and Technology . University of Illinois Press, 2008. (For analysis of science fiction in Disney live-action films.)