diff --git a/.vscode/ltex.dictionary.en-US.txt b/.vscode/ltex.dictionary.en-US.txt
index 127aead..85dd19e 100644
--- a/.vscode/ltex.dictionary.en-US.txt
+++ b/.vscode/ltex.dictionary.en-US.txt
@@ -104,3 +104,5 @@ rearticulated
 VV
 Vh
 aa
+Underspelling
+disharmonic
diff --git a/references.bib b/references.bib
index 514d787..06ccafd 100644
--- a/references.bib
+++ b/references.bib
@@ -266,6 +266,15 @@ @book{macrivail2009
   year           = {2009},
 }
 
+@book{boot2009,
+  author         = {Boot, Erik},
+  title          = {The Updated Preliminary Classic Maya-English, 
+                    English-Classic Maya Vocabulary of Hieroglyphic Readings},
+  publisher      = {Mesoweb Resources},
+  year           = {2009},
+  url            = {http://www.mesoweb.com/resources/vocabulary/Vocabulary-2009.01.pdf}
+}
+
 @book{crystal2010,
   author         = {Crystal, David},
   title          = {The Cambridge Encyclopedia of Language},