| Title | Variable Piece 4 : Secrets |
| Level | Item |
| Artist | Huebler, Douglas (1924 - 1997) |
| Format | Artist Book |
| Pub_Date | [1973?] |
| Pub_Place | New York |
| Publisher | Printed Matter Inc. |
| Language | English |
| Ref_No | GMA A33/3/AB/0119 |
| Description | Variable Piece 4: Secrets / by Douglas Huebler; white cover with black text; glue binding; text, no illustrations |
| Repository | Scottish National Gallery of Modern Art Archive |