Today, we say "gnotobiotic," "microbiome-depleted," or "antibiotic-induced dysbiosis." The phrase "germ free" became taboo after the HIV/AIDS crisis, as it implied sterility was desirable. So a 1973 "Germ Free Report" would not be indexed with modern keywords.
The film explored the lowering age of sexual maturity and activity among teenagers (specifically those "14 and Under" ). early awakening report 14 and under 1973 germ free
Growing up in a Bubble: Using Germ-Free Animals to ... - PubMed we say "gnotobiotic