References
- see its Fordhandlinger 944 945
- A pictorial representation of the mode of navigation, from the descriptions of Olafsen and Henderson, is to be found in a work which may generally be consulted with advantage The Pictorial Museum of Animated Nature i 63 63 fig. 266
- John Wolley mentions only simple galleries in the turf at the surface of the ground, and holes in the sides of small hills in which they dwell, and outside of which the excrements occur in large heaps Skand. Naturf. Möde 1863 217 217 et seq.
- Smlgn. Eg. Olafsen , i 167 – 167 . 168