March 19 - Elvis Presley's autopsy is subpoened during the trial of Dr. George Nichopoulous, who would later be found guilty of overprescribing drugs to Presley, Jerry Lee Lewis and other clients.
March 29 - Ronald Selle, wins a lawsuit filed against the Bee Gees, Paramount Pictures and Polygram Records[?]. Selle alleged that the Bee Gees' song "How Deep is Your Love" plagiarized two sections of a song he wrote called "Let it End." The Bee Gees claim they never heard Selle's song. (The Bee Gees successfully appeal the decision in 1983.)
April 13 - The Broadway musical Grease closes its run of 3,883 performances, making it the longest running show on Broadway up until that time.