"jorgensen, s e. "
Guidelines of lake management vol. 1 :principles of lake man: agement/ S. E. Jorgensen - 1 ed. - kenya : unep 1988. - ", 199p.; 24 cm."
HD1681 / .G85 1988
Guidelines of lake management vol. 1 :principles of lake man: agement/ S. E. Jorgensen - 1 ed. - kenya : unep 1988. - ", 199p.; 24 cm."
HD1681 / .G85 1988