The Clean Climbing catalog appears to be written at the same time as the Chouinard 1972 catalog. A lot of the same writing is included in the 1972 catalog, except the Chouinard Clean Climbing catalog also has included a write up from John Stannard named "Nuts in the Shawangunks." Within the catalog I can only find one date, Nov/Dec 1971. Catalog donated by the Patagonia Archives.