Library of Congress information bulletin.

1969:1-26; v.31:no.44(1972:Nov.03); v.31:no.45(1972:Nov.10); v.31:no.46(1972:Nov.17); v.31:no.47(1972:Nov.24); v.31; v.31 1972; v.31:no.10(1972:Mar.10); v.31:no.11(1972:Mar.17); v.31:no.12(1972:Mar.24); v.31:no.13(1972:Apr.31); v.31:no.14(1972:Apr.07); v.31:no.15(1972:Apr.14); v.31:no.19(1972:May 12); v.31:no.20(1972:May 19); v.31:no.21(1972:May 26); v.31:no.22(1972:June 02); v.31:no.23(1972:June 09); v.31:no.24(1972:June 16); v.31:no.25(1972:June 23); v.31:no.26(1972:June 30); v.31:no.27(1972:July07); v.31:no.28(1972:July14); v.31:no.29(1972:July21); v.31:no.31(1972:Aug.04); v.31:no.3(1972:Jan.20); v.31:no.32(1972:Aug.11); v.31:no.33(1972:Aug.18); v.31:no.34(1972:Aug.25); v.31:no.35(1972:Sept.01); v.31:no.36(1972:Sept.08); v.31:no.37(1972:Sept.15); v.31:no.38(1972:Sept.22); v.31:no.39(1972:Sept.29); v.31:no.40(1972:Oct.06); v.31:no.41(1972:Oct.13); v.31:no.4(1972:Jan.27); v.31:no.42(1972:Oct.20); v.31:no.43(1972:Oct.27); v.31:no.48(1972:Dec.01); v.31:no.49(1972:Dec.08); v.31:no.50(1972:Dec.15); v.31:no.51(1972:Dec.22); v.31:no.5(1972:Feb.03); v.31:no.52(1972:Dec.29); v.31:no.6(1972:Feb.10); v.31:no.7(1972:Feb.17); v.31:no.8(1972:Feb.25); v.31:no.9(1972:Mar.03); v.32; v.32 1973; v.32:no.10(1973:Mar.09); v.32:no.11(1973:Mar.16); v.32:no.1(1973:Jan.05); v.32:no.12(1973:Mar.23); v.32:no.13(1973:Mar.30); v.32:no.14(1973:Apr.06); v.32:no.15(1973:Apr.13); v.32:no.16(1973:Apr.20); v.32:no.17(1973:Apr.27); v.32:no.18(1973:May 04); v.32:no.19(1973:May 11); v.32:no.20(1973:May 18); v.32:no.21(1973:May 25); v.32:no.2(1973:Jan.12); v.32:no.22(1973:June 01); v.32:no.23(1973:June 08); v.32:no.24(1973:June 15); v.32:no.25(1973:June 22); v.32:no.26(1973:June 29); v.32:no.27(1973:July 06); v.32:no.28(1973:July 13); v.32:no.29(1973:July 20); v.32:no.3(1973:Jan.19); v.32:no.4(1973:Jan.26); v.32:no.5(1973:Feb.02); v.32:no.6(1973:Feb.09); v.32:no.7(1973:Feb.16); v.32:no.8(1973:Feb.23); v.32:no.9(1973:Mar.02); v.33; v.33 1974; v.34; v.34 1975; v.35; v.35 1976; v.36; v.36 1977; v.37; v.37 1978; v.37:no.51(1978:Dec.22); v.37:no.52(1978: