By NAM (National Association of Manufacturers). v.1:no.7 (1935:Apr.). Item is in English.

By NAM (National Association of Manufacturers). v.1:no.8 (1935:May). Item is in English.

By NAM (National Association of Manufacturers). v.1:no.9 (1935:Aug.). Item is in English.

By NAM (National Association of Manufacturers). no.12 (1936:Apr. 20). Item is in English.

By NAM (National Association of Manufacturers). no.15 (1936:Dec. 7). Item is in English.

By NAM (National Association of Manufacturers). no.16 (1937:Jan. 22). Item is in English.

By NAM (National Association of Manufacturers). no.17 (1937:Feb. 25). Item is in English.

By NAM (National Association of Manufacturers). no.18 (1937:Mar. 21). Item is in English.

By NAM (National Association of Manufacturers). no.20 (1937:May 25). Item is in English.

By NAM (National Association of Manufacturers). no.21 (1937:June 13). Item is in English.