[45] In “Engineering Valuation of Public Utilities and Factories.”
[46] In “Auditing, Theory and Practice.”
[47] In “Accounting in Theory and Practice.”
[48] P. J. Esquerré, in “Applied Theory of Accounts.”
[49] In “Auditing—Theory and Practice.”
[50] “The Principles of Bond Investment,” by Lawrence Chamberlain.
[51] Montgomery’s “Auditing, Theory and Practice.”
[52] In “Principles of Economics.”
[53] In “Political Economy.”
[54] In “Principles of Economics.”