Pennsylvania Deitsh Dictionary by Thomas Beachy (Very good, 1999, Pbk, 164 pages, Carlisle Press)

Pennsylvania Deitsh Dictionary: A Dictionary for the Language Spoken by the Amish and Used in the Pennsylvania Deitsh New Testament 

Contains the vocabulary used in Es Nei Teshtament (#1612), the Pennsylvania Deitsh translation of the New Testament. The new spelling system in this dictionary was developed through extensive surveys with potential readers by Hank Hershberger.