This copyrighted 1935 (Gershwin Publishing Corp) Vintage Sheet Music entitled "It Ain't Necessarily So (Porgy & Bess)" is in very good condition with slight wear, creases, writing on the cover & slightly yellowed but appears to be complete. This sheet music measures approx. 9" x 12" and is suitable for framing. The lyrics are by DuBose Heyward & Ira Gershwin & the music is by George Gershwin and the libretto is by DuBose Heyward.