Are notes prepared by a government attorney producible where they relate to the subject matter of the testimony of the witness?

Notes prepared by a government attorney are "statements" and producible where they relate "to the subject matter of the testimony of a government witness (and have) been 'signed or otherwise adopted or approved' by the Government witness." United States v. Goldberg, 425 U.S. at 98, 96 S.Ct. at 1342. "This requirement is not met unless the lawyer reads back, or the witness himself reads what the lawyer has written. 425 U.S. at 110-11 n. 19, 96 S.Ct. 1338." United States v. Goldberg, 582 F.2d 483, 487 (9th Cir. 1978), cert. denied, 440 U.S. 973, 99 S.Ct. 1538, 59 L.Ed.2d 790 (1979).