(Publication 643, supp. 1.) * For Sale by Superintendent of Documents. Paper, $1.50 a yr. (including basic volume and supplementary material for an indefinite period); 50c. additional for foreign mailing. • Sent to Depository Libraries. Item 960
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* For Sale by Superintendent of Documents. Paper, $1.50 a yr. (including basic volume and supplementary material for an indefinite period); 50c. additional for foreign mailing. • Sent to Depository Libraries. Item 960