Add this copy of On Purposeful Systems to cart. $57.44, good condition, Sold by ThriftBooks-Dallas rated 4.0 out of 5 stars, ships from Dallas, TX, UNITED STATES, published 1972 by Aldine-Atherton.
Add this copy of On Purposeful Systems to cart. $58.02, very good condition, Sold by Midtown Scholar Bookstore rated 5.0 out of 5 stars, ships from Harrisburg, PA, UNITED STATES, published 1972 by Aldine-Atherton.
Add this copy of On Purposeful Systems to cart. $84.00, very good condition, Sold by J.E. Miles, A Bookseller rated 5.0 out of 5 stars, ships from OCEANSIDE, CA, UNITED STATES, published 1972 by Intersystems.
Add this copy of On Purposeful Systems to cart. $86.26, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 1972 by Aldine-Atherton.