The following selections were found in iTunes for
Miles Davis "It Ain't Necessarily So":

Title	Artist	Album	PURCHASE
It Ain't Necessarily So	Miles Davis	Porgy and Bess
It Ain't Necessarily So (From "Porgy & Bess")	Gil Evans & Miles Davis	The Best of Miles Davis & Gil Evans
It Ain't Necessarily So (from 'Porgy & Bess')	Gil Evans & Miles Davis	The Complete Columbia Studio Recordings
It Ain't Necessarily So (from 'Porgy & Bess')	Gil Evans & Miles Davis	The Complete Columbia Studio Recordings
It Ain't Necessarily So	Miles Davis	Gershwin Jazz
It Ain't Necessarily So	Gil Evans & Miles Davis	The Complete Columbia Studio Recordings
It Ain't Necessarily So	Gil Evans & Miles Davis	The Complete Columbia Studio Recordings
It Ain't Necessarily So	Miles Davis	Concierto de Aranjuez
It Ain't Necessarily So	Miles Davis	Jazz Gershwin