703,819 MICHAJŁOW WŁODZIMIERZ /red./ 703,820 Protection of mans natural environment.A collective work initiated and planned by Władysław Szafer.Prepared for publication by the Editorial Committee headed by Włodzimierz Michajłow.Transi, from the Polish manuscript by Andrzej Diniejko /i in Warszawa 1973 PWN 8° s. 663,tabl.4,ilustr. " Polish Academy of Sciences Committee of the Protection of Nature and Natural Resources Nature Protection Research Centre