SPENCER, H. C. c. (1980). Technical Drawing Problems. McMillan Publishing Co. Inc.
Chicagoスタイル(17版)引用形式SPENCER, Henry Cecil cs. Technical Drawing Problems. McMillan Publishing Co. Inc, 1980.
MLA(8版)引用形式SPENCER, Henry Cecil cs. Technical Drawing Problems. McMillan Publishing Co. Inc, 1980.
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