Many references to endnotes that reference another book are followed by
a pair of square brackets containing the page number in that other book.
The book also has four footnotes that originally were at the bottoms of
pages, but have been moved here to follow the paragraphs that reference
them. They use simple “abcd” references.
The superscript on page 194 is shown as ^{33} and the subscripts in
Figure 8 are shown as _{1} or _{2}.
Three endnotes are unreferenced (XII-14, XIII-2 and XIII-6); several
are referenced more than once.
The index was not systematically checked for proper alphabetization or
correct page references.