xvii 342 pages, indexed. There is an onership inscription on the front end paperand the pages are lightly yellowed, else immaculate."This book has been written to help students and their teachers, at various levels, to understand the principles, some of the methods, and ways of interpreting vegetational and environmental data acquired in the field." Subject headings provided on the copyright page courtesy Library of Congress : 1. Botany-Ecology-Methodology. 2. Plant communities-Research-Methodology. 3. Vegetation surveys. 4. Vegetation classification.