Billy Vera & Judy Clay. The demo was by Billy Vera & Nona Hendryx. According to Billy the melody was inspired by the Joe Cuba Sextette's To Be With You (Saeca - '63).
Nona Hendryx & Billy Vera [re-recording by the duet that cut it first in '66, when Nona was one of Patti Labelle's Bluebelles, reason why it was shelved]
Chip Taylor [coauthor]
For Bette Midlers Storybook Children, see: Daybreak.