bls_1725-33_1972.pdf
bls_1900-64_1977.pdf
bls_1625-73_1969.pdf
bls_1950-24_1977.pdf
bls_1660-60_1970.pdf
bls_1465-81_1966.pdf
bls_1625-86_1969.pdf
bls_1725-71_1972.pdf
bls_1725-90_1972.pdf
bls_1725-94_1972.pdf
bls_1900-65_1977.pdf
bls_1530-70_1967.pdf