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- Hymenoptera Introduction and Key to Families
- Bees in a Changing World: How Land Surface Phenology, Bee Community Distributions, and Pollinator-Plant Interactions Are Impacted by Urbanization and Agriculture
- The Bees of Colorado (Hymenoptera: Apoidea: Anthophila)
- Hymenoptera Apidae
- European Red List of Bees
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- The Bee Species Family Colletidae
- Evolution of the Leafcutter Bees and Chemical Ecology of Bee-Flower Relationships
- The Bees of the Willamette Valley a Comprehensive Guide to Genera
- Diversity and Foraging Patterns of Bees on Flowers of Cucurbita Pepo (Cucurbitaceae) in Costa Rica
- Hymenoptera, Apoidea) for Sardinia (Italy)
- The Plants Visited by Bees in Canada, with Focus on Eucera Pruinosa Say
- Cucurbits As a Model System for Crop Pollination Management
- Identification of Bees in Southwest Idaho—A Guide for Beginners
- Population Decline in a Ground-Nesting Solitary Squash
- Cucurbits As a Model System for Crop Pollination Management
- Phylogeny, New Generic-Level Classification, And
- Perspectives of Pollinators
- Global Warming, Advancing Bloom and Evidence for Pollinator Plasticity from Long-Term Bee Emergence Monitoring
- Taxonomic and Phylogenetic Problems in Old World Eucerine Bees, with Special Reference to the Genus Tarsalia Morawitz, 1895 (Hymenoptera: Apoidea: Anthophoridae)
- Bee Observer Cards Complete Set of 36 Cards There Are Approximately 20,000 Described Species of Bees Living on All Continents Except Antarctica