Margaret Ponting (2003). "Megalithic Callanish". In Clive Ruggles (ed.). Records in Stone: Papers in Memory of Alexander Thom. Cambridge University Press. pp. 423–441. ISBN978-0-521-53130-6.
Soren, D. & Soren, N. (1999): A Roman villa and a late Roman infant cemetery : excavation at Poggio Gramignano, Lugnano in Teverina. Bibliotheca archaeologica (Rome, Italy), no. 23. L'Erma di Bretschneider, Rome p 184 from Google books
Foundation Publication Inc (1 March 1997). New American Standard Bible. Foundation Publications, publisher for the Lockman Foundation. ISBN9781885217684. Retrieved 8 April 2011.
cf. Inana's descent to the nether world line 25. The Sumerian has: gi-diš-nindaneš2-gana2 za-gin3 šu ba-ni-in-du8 i.e. taken literally the rod would have the length of one nindan (6 cubit = 5.94m) and the eš2-gana2 the surveyor's line - would be ten nindan in length.
Rowlett, Russ (25 April 2002). "rod (rd) [1]". How Many? A Dictionary of Units of Measurement. University of North Carolina at Chapel Hill. Retrieved 1 November 2010.
Rowlett, Russ (15 December 2008). "lug". How Many? A Dictionary of Units of Measurement. University of North Carolina at Chapel Hill. Archived from the original on 16 October 2013. Retrieved 1 November 2010.
Rowlett, Russ (15 December 2008). "lug". How Many? A Dictionary of Units of Measurement. University of North Carolina at Chapel Hill. Archived from the original on 16 October 2013. Retrieved 1 November 2010.