GRANT, H. E. Engineering drawing without problems#Hiram E. Grant. McGraw Hill.
Lua i Stíl Chicago (17ú heag.)GRANT, Hiran E. Engineering Drawing Without Problems#Hiram E. Grant. McGraw Hill.
Lua MLA (8ú heag.)GRANT, Hiran E. Engineering Drawing Without Problems#Hiram E. Grant. McGraw Hill.
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