Columbia subject headings:
Axel Ax:son Johnsons ekologiska station (Färjstaden, Sweden)
Botany.
Hymenoptera.
Harvard subject headings:
Axel Ax:son Johnsons ekologiska station (Färjestaden, Sweden)
Botany
Ecology.
Entomology.
Hymenoptera.
Princeton subject headings:
Axel Ax:son Johnsons ekologiska station (Färjestaden, Sweden).
Botany.
Hymenoptera.