In this important reference work, edited by Goodspeed, several scholars have indexed the Greek and Latin words from early works of the Church, including 1 Clement, 2 Clement, Epistle of Barnabas, Papias, Epistle to Diognetus, Letters of Ignatius, Letter of Polycarp to Philip, Martyrdom of Polycarp, Shepherd of Hermas, and Didache.

Editor - Edgar J. Goodspeed
Editor - K. C. Hanson

Index Apologeticus

A Grammar of Mishnaic Hebrew by M. H. Segal
Assyrian Grammar by A. H. Sayce
Grammar of Palestinian Jewish Aramaic by William B. Stevenson
A Compendious Syriac Dictionary
Index Patristicus
Greek-English Concordance to the New Testament by J.B. Smith
Introductory Syriac Method and Manual by Robert Dick Wilson
Ethiopic Grammar by August Dillmann, Carl Bezold
Johannine Vocabulary by Edwin A. Abbott
Thesaurus Syriacus
Hebrew Vocabularies
Johannine Grammar by Edwin A. Abbott
Syntax of the Moods and Tenses in New Testament Greek by Ernest DeWitt Burton
The Student's Concise Hebrew-English Lexicon of the Bible by * *
Compendious Syriac Grammar by Theodor Noeldeke
A Treatise on the Use of the Tenses in Hebrew by Samuel R. Driver
Syntax of the Hebrew Language of the Old Testament by Georg Heinrich Ewald
Lexicon Syriacum by Carl Brockelmann
Fundamentals of Sumerian Grammar / Grundzüge der Sumerischen Grammatik by Arno Poebel
An Introduction to the Gothic Language by Thomas O. Lambdin
A Coptic Dictionary by Walter E. Crum
A Greek Grammar by William W. Goodwin
Mandaean Grammar / Mandäische Grammatik by Theodor Noeldeke
Syntax of the Moods and Tenses of the Greek Verb by William W. Goodwin
Syriac Grammar with Bibliography, Chrestomathy and Glossary by Eberhard Nestle
Lexicon to the Syriac New Testament by William Jennings