《American Bee Journal, Vol. XVII, No. 1, January 5, 1881》 - 免费有声读物

The American Bee Journal is the “oldest bee paper in America established in 1861 devoted to scientific bee-culture and the production and sale of pure honey. This issue covers such topics such as Alsike Clover for Bee Pasturage, Adulteration of Syrups, Fertilization in Confinement, and Stingless Bees of South America. - Summary by Larry Wilson