Eyles, V. A., 1923. Summary of Progress. Geol. Survey Great Britain, 1922.
Bailey, E. B., and Others, 1916. The Geology of Ben Nevis and Glen Coe. Mem. Geol. Survey.
Knopf, A., 1936. Igneous Geology of the Spanish Peaks Region, Colorado. Bull. Geol. Soc. Amer., xlvii, pp. 1727–1784.
MacGregor, A. G., 1939. Description of Exhibit of Scottish Monchiquitic Rocks containing large Apatites. Quart. Journ. Geol. Soc., xcv, p. cxviii.
MacGregor, A. G., 1948. Problems of Carboniferous-Permian Volcanicity in Scotland. Quart. Journ. Geol. Soc., civ, pp. 133–153.
MacGregor, A. G., and Others, 1949. The Geology of Central Ayrshire. Mem. Geol. Survey.
MacGregor, M., and MacGregor, A. G., 1948. British Regional Geology: The Midland Valley of Scotland. Mem. Geol. Survey.
Richey, J. E., and Others, 1930. The Geology of North Ayrshire. Mem. Geol. Survey.
Richey, J. E., 1939. The Dykes of Scotland. Trans. Edin. Geol. Soc., xiii, pp. 393–435.
Richey, J. E., and Kennedy, W. Q., 1939. The Moine and Sub-Moine Series of Morar, Inverness-shire. Bull. Geol. Survey, Gt. Britain, ii, p. 26.
Wilson, G. V., and Others, 1935. The Geology of the Orkneys. Mem. Geol. Survey.
Wilson, J. S. Grant., 1898. Summary of Progress, Geol. Survey Great Britain, pp. 152–3.