(1957). Wood structural design data (3rd ed.). Washington, D.C.: National Lumber Manufacturers Association Publication.
Παραπομπή Chicago StyleWood Structural Design Data. 3rd ed. Washington, D.C.: National Lumber Manufacturers Association Publication, 1957.
Παραπομπή MLAWood Structural Design Data. 3rd ed. Washington, D.C.: National Lumber Manufacturers Association Publication, 1957.
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