Univ of Wisconsin Press. p. 7. ISBN   978-0-299-18040-9 . http://books.google.com/books?id=MEeaVzI0NsgC&pg=PA7 . Retrieved 19 March 2011 .   ^ "A Memento Mori to the Earth" . Time . 1970-05-04 . http://www.time.com/time/magazine/article/0,9171,943782,00.html .   ^ Finney, John W. (April 15, 1971). "Muski says FBI spied at rallies on '70 Earth Day" . The