Exhibition catalogue published in conjunction with show held of work from the collection of Dorothy and Herbert Vogel, May 3 - July 5, 1987. Artists include Robert Barry, Sol LeWitt, Robert Mangold, and Richard Tuttle from the collection of Dorthy and Herbert Vogel. Texts by Erich Franz and Vivian E. Barnett. Includes list of works, biographies, and selected bibliographies. In English and German.