The product is a paperback workbook titled "Master ASL!: Fingerspelling, Numbers, and Glossing" by Jason E. Zinza. Published by Sign Media, Incorporated in 2006, the book is part of the Foreign Language Study subject area and focuses on American Sign Language. It includes illustrated exercises and charts to help with learning ASL fingerspelling, numbers, and glossing techniques. The book is intended for adult and further education levels and is written in English. Well used Still has life
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