Asri, Widowati and Juli, Astono and Agus, Purwanto (2014) INFLUENCE OF FREQUENCY NATURAL GRASSHOPPERS SOUND TO LEAF CHLOROPHYLL CONTENT TEAK (TECTONA GRANDIS) AND PEANUT (ARACHIS HYPOGAEA) AS NATURAL SCIENCE LEARNING RESOURCES. Proceeding of International Conference On Research, Implementation And Education Of Mathematics And Sciences 2014. (Submitted)