Não informado. (1922). Engineering and Mining Journal-Press. McGraw-Hill Publications.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Engineering and Mining Journal-Press. New York: McGraw-Hill Publications, 1922.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Engineering and Mining Journal-Press. McGraw-Hill Publications, 1922.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.