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Bionomics of five wood-nesting solitary species of bees (Hym., Megachilidae), with emphasis on flower relationships
Käpylä, M. (1978). Bionomics of five wood-nesting solitary species of bees (Hym., Megachilidae), with emphasis on flower relationships. Biological Research Reports from the University of Jyväskylä, 5, 1-89.