Data for 1974 issued as Supplement 1 to Bulletin no. 1775-59.Title from cover.Description based on: 1981.Mode of access: Internet
Data for 1973 issued as Supplement 1 to Bulletin no. 1775-32.Mode of access: Internet
Title varies slightly.Description based on: Jan. 1977; title from caption.Mode of access: Internet
Description based on: Aug. 1988; title from cover.Library has Aug. 1988.Bulletin 3045-36.Establishme... Read more
Data for 1974 issued as Supplement 1 to Bulletin no. 1775-96.Mode of access: Internet
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