a guide to AIR QUALITY MONITORING   with LICHENS

William C. Denison, author 

Sue Carpenter, Illustrator

Copyright 1973 by Lichen Technology, Inc.

Permission is given to reproduce this guide, either as single copies forpersonal use or as small runs, under twenty copies, for teaching purposes. Those wishing to make larger numbers of copies of this guide, either in whole or in part, should contact the author for permission at: Northwest Mycological Consultants, Inc, 702 NW Fourth St., Corvallis, OR, 97330, USA,

First Printing October 1973
Printed in the United States of America