All rights to every part of this book, in all its editions, foreign and domestic are reserved by Paul Pietsch or his estate. But, providing you accurately identify the author and the source, you -- or your students -- may use or copy, free, any or all parts of the work for non-commercial purposes.

If you want to purchase a bound copy of the first edition ($77.50), please contact Books on Demand, University Microfilms International , 330 N. Zeeb Road, Ann Arbor, MI 48106-9976 [1-800-521-0600]; order number AU00447; original publisher, Houghton Mifflin, Boston, 1981.

Paul Pietsch,
Bloomingting, Indiana
January, 1996