Franchises North of the Border: Baronies and Regalities in Medieval Scotland by Alexander Grant. A pre-2008 preliminary paper (43pp) in the CORE collection of the Open University.
The Clans, Septs, and Regiments of the Scottish Highlands by Frank Adam 1908. Digitised by Duke University Libraries. 640pp.
The Robes Of The Feudal Baronage Of Scotland by Thomas Innes Of Learney and Kinnardy, F.S.A.Scot., Lord Lyon, King Of Arms. October, 1945. A 61pp .pdf document from the Proceedings of the Society of Antiquaries of Scotland.
The political role of the Three Estates in Parliament and General Council in Scotland, 1424-1488. This PhD Thesis by Roland J. Tanner in 1999 is provided © St Andrews Research Repository. It is an extensive work of 444pp.
The Significance Of Status And Genetics In Succession To Titles, Honours, Dignities And Coats Of Arms: Making The Case For Reform. by Crispin Agnew of Lochnaw and Gillian Black. Published online © Cambridge University Press, July 2018 from the Cambridge Law Journal Vol.77 Issue 2.
Titles Included in UK Passports. Scottish Feudal Baronies in a 4pp .pdf UK file. Government document file.
A system of heraldry, speculative and practical. Vol 1 Alexander Nisbet -1816.
A system of heraldry, speculative and practical. Vol 2 Alexander Nisbet -1816.
Scottish Heraldry Made Easy George Harvey Johnston (1912).
Fairbairn's book of crests of the families of Great Britain and Ireland Vol.1. James Fairbairn (1905).
Fairbairn's book of crests of the families of Great Britain and Ireland Vol.2. James Fairbairn (1905).
The Law and Practice of Heraldry in Scotland George Seton (1863).
Specimen Petitions for Arms - Information Leaflet 4 (.pdf) Court of Lord Lyon.