Which u. s. supreme court case established the right to counsel for juvenile defendants?

In Re Gault was the landmark U.S. Supreme Court decision in 1967 that decided that juveniles accused of crimes in a delinquency proceeding must be afforded a majority of the very same due process rights as adults, such as the right to timely notification of the charges, the right to confront witnesses, the right against self-incrimination, and the right to legal counsel even if they cannot afford such.