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The Gallaudet Dictionary of American Sign Language
Schools & Teaching
Author: Rob Hills
Avaliable on Amazon
Student, not expert, but.. the definitive reference is . The front matter establishes a system for taxonomy of signs: one hand or two, handshapes, location, motion, facial expression, modifiers, classifiers, etc. and then has a big dictionary. That front matter should be very helpful for translation authors. Note however, that's their dialect/accent, and other regions will have variations. Bill Vicars  is pretty good about cataloging many variations but it's all video material, not reference.
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