Library of Congress subject headings / Subject Cataloging Division, Processing Department.

12TH ED v.1; 12TH ED v.2 1989; 1990 v.1; 13th.ed. 1990 v.1; 1990 v.2; 13th.ed. 1990 v.2; 1990 v.3; 13th.ed. 1990 v.3; 1991 v.1; 14th.ed. 1991 v.1; 1991 v.2; 14th.ed. 1991 v.2; 1991 v.3; 14th.ed. 1991 v.3; 1992 v.1; 15th.ed. 1992 v.1; 1992 v.2; 15th.ed. 1992 v.2; 1992 v.3; 15th.ed. 1992 v.3; 1992 v.4; 15th.ed. 1992 v.4; 1993 v.1; 16th.ed. 1993 v.1; 1993 v.2; 16th.ed. 1993 v.2; 1993 v.3; 16th.ed. 1993 v.3; 1993 v.4; 16th.ed. 1993 v.4; 1994:2; 1994:4; 1994:1; 1994:3; 1994 v.1; 17th.ed. 1994 v.1; 1994 v.2; 17th.ed. 1994 v.2; 1994 v.3; 17th.ed. 1994 v.3; 1994 v.4; 17th.ed. 1994 v.4; 12TH ED v.3; 13TH ED v.1; 13TH ED v.2; 13TH ED v.3; 14TH ED v.1; 14TH ED v.2; 14TH ED v.3; 15TH ED v.1; 15TH ED v.2; 15TH ED v.3; 15TH ED v.4; 16TH ED v.1; 16TH ED v.2; 16TH ED v.3; 16TH ED v.4; 17TH ED v.1 1994; 17TH ED v.2 1994; 17TH ED v.3 1994; 17TH ED v.4 1994; 1995 v.1; 18th.ed. 1995 v.1; 1995 v.2; 18th.ed. 1995 v.2; 1995 v.3; 18th.ed. 1995 v.3; 1995 v.4; 18th.ed. 1995 v.4; 18TH ED v.1 1995; 18TH ED v.2 1995; 18TH ED v.3 1995; 18TH ED v.4 1995; 1996 v.1; 19th.ed. 1996 v.1; 1996 v.2; 19th.ed. 1996 v.2; 1996 v.3; 19th.ed. 1996 v.3; 1996 v.4; 19th.ed. 1996 v.4; 19TH ED v.1 1996; 19TH ED v.4 1996; 1997:1 (20); 1997:2 (20); 1997:3 (20); 1997:4 (20); 1997 v.1; 20th.ed. 1997 v.1; 1997 v.2; 20th.ed. 1997 v.2; 1997 v.3; 20th.ed. 1997 v.3; 1997 v.4; 20th.ed. 1997 v.4; 20th ed. v.1 1997; 20th ed. v.2 1997; 20th ed. v.3 1997; 20th ed. v.4 1997; 21st 1898/1998 v.1 A-C; 21st 1898/1998 v.2 D-H; 21st 1898/1998 v.3 I-M; 21st 1898/1998 v.4 N-R; 21st 1898/1998 v.5 S-Z; 1998:1 (21); 1998:2 (21); 1998:3 (21); 1998:4 (21); 1998:5 (21); 1998 v.1; 21st.ed. 1998 v.1; 1998 v.2; 21st.ed. 1998 v.2; 1998 v.3; 21st.ed. 1998 v.3; 1998 v.4; 21st.ed. 1998 v.4; 1998 v.5; 21st.ed. 1998 v.5; 21st ed. v.1 1998; 21st ed. v.2 1998; 21st ed. v.3 1998; 21st ed. v.4 1998; 21st ed. v.5 1998; 1999 v.1; 1999 v.2; 1999 v.3; 1999 v.4; 1999 v.5; 22nd ed. 1999 v.1; 22nd ed. 1999 v.2; 22nd ed. 1999 v.3; 22nd ed. 1999 v.4; 22nd ed. 1999 v.5; 2000:1 (23); 2000:2 (23); 2000:3 (23); 200