Παραπομπή APA

(1969). Metric standards published and in progress: Complete to 31st July 1969. London: British Standards Institution.

Παραπομπή Chicago Style

Metric Standards Published and in Progress: Complete to 31st July 1969. London: British Standards Institution, 1969.

Παραπομπή MLA

Metric Standards Published and in Progress: Complete to 31st July 1969. London: British Standards Institution, 1969.

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