Principles of sports training : introduction to the theory and methods of training / by a team of writers ; chief editor, Dietrich Harre ; (contributors, Barsch, Jürgen ... et al. ; translators, Helmut Bachmann, Doris Bailey, Ruslan Tulburg ; illustrations, Karlheinz Birkner). - Harre, Dietrich; Barsch, Jürgen (Sportverlag, 1982)