MATHEMATICAL ANALYSIS OF THE SENSIBILITY AND STABILITY OF PLANT MODELS; pp. 1–13

SEXUAL SPECIFICITY OF THE COPPER CONTENT AND WEIGHT VARIATION IN SADURIA ENTOMON L.; pp. 14–20

RESPONSES OF THE MACROZOOBENTHOS TO WATER-BLOOMS IN THE EUTROPHIED BROWN-WATER LAKE VALGUTA MUSTJÄRV, SOUTH ESTONIA; pp. 21–32

HUMAN IMPACT ON THE DEVELOPMENT OF LANDSCAPE STRUCTURE OF THE ISLETS OF WEST ESTONIA; pp. 33–41