Cryptogams : cyanobacteria, algae, fungi, lichens : textbook and practical guide / Karl Esser ; photographs, Dieter Graw ... [et al.] ; drawings, Hans-Jürgen Rathke ; English translation of the revised text, Michael G. Hackston and John Webster. Kryptogamen. English Esser, Karl, 1924. Cryptogams. QK505 .E8713 1982 586 ESC includes bibliographical references and index. Cambridge ; Cambridge University Press, 1982. 1982. 1982 Text xi, 610 p. : eng engger