Wratten, S. D. Aggregation in the Birch Aphid Euceraphis punctipennis (Zett.) in Relation to Food Quality. Journal of Animal Ecology. 1974, 43 (1): 191–198. JSTOR 3166. doi:10.2307/3166.
jstor.org
Wratten, S. D. Aggregation in the Birch Aphid Euceraphis punctipennis (Zett.) in Relation to Food Quality. Journal of Animal Ecology. 1974, 43 (1): 191–198. JSTOR 3166. doi:10.2307/3166.