June 12: The UN General Assembly adopts a Treaty on the Non-Proliferation of Nuclear Weapons to take effect March 5, 1970.
June 13: Johnny Cash performs a live concert at California’s Folsom Prison.
June 14: Yasmine Bleeth is born in New York City.
The Whole World Was Watching: An oral history of 1968. A joint project between South Kingstown High School and Brown University’s Scholarly Technology Group
Timelines of History
Wikipedia Music Timeline
Frank Eugene Smitha’s Macrohistory and World Report