Diptera danica : genera and species of flies hitherto found in Denmark - Lundbeck, William, 1863 -1941 (G.E.C. Gad, 1916)

Diptera danica : genera and species of flies hitherto found in Denmark - Lundbeck, William, 1863 -1941 (G.E.C. Gad, 1922)

Diptera danica : genera and species of flies hitherto found in Denmark - Lundbeck, William, 1863 -1941 (G.E.C. Gad, 1927)

Diptera Danica: genera and species of flies hitherto found in Denmark - Lundbeck, William, 1863 -1941 (G.E.C. Gad, 1907)