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Blackboard slate
Recommendation covering sizes, finish, and thickness of blackboard slate. (5¢)
Blackboard slate
Recommendation covering sizes, finish, and thickness of blackboard slate. (5¢)
Blackboard slate
U S Nat Bur Standards -- Simplified Practice Recommendation
1936
12 pages
Standard
English
© Metadata Copyright Elsevier B. V. All rights reserved.
Standard sizes of blackboard slate
TIBKAT | 1966
|Stone Slate, Clay Tile and Metamorphic Slate
Wiley | 2008
|Engineering Index Backfile | 1928