Professor V. Sukachev, a Soviet developer of the doctrine of forest types, published a guide to the study of forest types in 1931. He states in the introduction of the guide that his aim is to facilitate the work of beginners in determining forest types and to instruct them in developing methods for their description and classification.
This Finnish edition of the guide includes new picture material and has an extensive supplementary preface, written by the author, that presents his view on forest types. The guide describes the concept of forest types, methods of describing forest types, guidelines to material collected in the forests and principles of classification of the different forest types.