811 A.A.V.V. Minutes of proceedings of the institution of civil Engineers(Tudsbery J.H.T. – vol.CCXXXVII) London (1935); (1644) R.II.33
812 A.A.V.V. Minutes of proceedings of the institution of civil Engineers(Tudsbery J.H.T. – vol.CCXXXVIII) London (1935); (1645) R.II.34
