I was researching a project just now, came across this, and then noticed the date:
ROBERT SMITHSON, 35, A SCULPTOR, IS DEAD[The New York Times]
July 24, 1973, Tuesday
Page 41, 227 words
Robert Smithson, a sculptor, was killed in the crash of a light plane on Friday, along with the pilot and a photographer, as they were inspecting one of his "Earth works" under construction on a ranch near Amarillo, Tex. He was 35 years old and lived at 799 Greenwich Street.