Vintage (1975) Golden Encyclopedia For Chord Organ American Bicentennial Edition Volumes I And II Hardback Songbook - The Golden Encyclopedia for Chord Organ Volumes 1 & 2 American Bicentennial Edition 1975 is a comprehensive nonfiction book set focused on the chord organ, a musical instrument popular among young adults, ages 4-12, and adults. Published by Hansen Publications / Hal Leonard, this hardcover book set features expert editor Roger Bobley and covers topics related to music and musical instruments. This special edition, released in 1975 to commemorate the American Bicentennial, provides detailed information and insights into the chord organ, making it a valuable resource for music enthusiasts and learners.