Double sided postcard / announcement published in conjunction with show about the collections of Stanley Marsh and John Caldor, held May 29 - June 21, [1975] as part of the "Collectors of the Seventies" series of exhibitions held at The Clocktower in 1975-76. "A presentation of information regarding two individuals whose interest in artist's projects represent new developments in the relationship between the collector and the artist." --text from the card.