the UCLA Chicano Studies Research Center,
the Arhoolie Foundation,
and the UCLA Digital Library
Tape Box contains manufacturing instructions / order for releases 950-A/B & 951-A/B, which is not dated. Order details state “1200 Pressings this number (78), 300 Pressings this number (45), Order 3,000 labels each side, Order 1,000 labels each side (45)”.