Scholars Portal
1931-2026
Preserved
2026-03-19
Preserved : 1 (1, 2, 4 to 6); 2 (7 to 14); 3 (15 to 22); 4 (23 to 30); 5 (31 to 38); 6 (39 to 46); 7 (47 to 54); 8 (55 to 62); 9 (63 to 66, 69, 70); 10 (71 to 78); 11 (79 to 86); 12 (87 to 94); 13 (95 to 102); 14 (103 to 110); 15 (111 to 118); 16 (119 to 126); 17 (127 to 134); 18 (135 to 142); 19 (143 to 150); 20 (151 to 158); 21 (159 to 166); 22 (167 to 174); 23 (117, 175 to 182); 24 (183 to 190); 25 (191 to 198); 26 (199 to 206); 27 (207 to 214); 28 (215 to 222); 29 (223 to 230); 30 (231 to 238); 31 (239 to 246); 32 (247 to 254); 33 (255 to 262); 34 (263 to 270); 35 (271 to 278); 36 (279 to 286); 37 (287 to 294); 38 (295 to 302); 39 (303 to 306); 40 (307 to 310); 41 (311 to 314); 42 (315 to 318); 43 (319 to 323); 44 (324 to 327); 45 (328 to 333); 46 (334 to 339); 47 (340 to 346); 48 (347 to 351); 49 (352 to 357); 50 (358 to 363); 51 (364 to 369); 52 (370 to 375); 53 (376 to 381); 54 (382 to 387); 55 (388 to 393); 56 (394 to 399); 57 (400 to 405); 58 (406, 407)
LOCKSS Archive
2010-2012
Preserved
2026-04-06
42 to 44
CLOCKSS Archive
2010-2015
Preserved
2026-04-06
42 to 47
Portico
1931-2016
Preserved
2026-04-09
Preserved : 1931/1932: 1(1-6), 1933/1934: 2(7-14), 1935/1936: 3(15-22), 1937/1938: 4(23-30), 1939/1940: 5(31-38), 1941/1942: 6(39-46), 1943/1944: 7(47-54), 1945/1946: 8(55-62), 1947/1948: 9(63-66, 69-70), 1949/1950: 10(71-78), 1951/1952: 11(79-86), 1953/1954: 12(87-94), 1955/1956: 13(95-102), 1957/1958: 14(103-110), 1959/1960: 15(111-118), 1961/1962: 16(119-126), 1963/1964: 17(127-134), 1965/1966: 18(135-142), 1967/1968: 19(143-150), 1969/1970: 20(151-158), 1971/1972: 21(159-166), 1973/1974: 22(167-174), 1975/1976: 23(117, 175-182), 1977/1978: 24(183-190), 1979/1980: 25(191-198), 1981/1982: 26(199-206), 1983/1984: 27(207-214), 1985/1986: 28(215-222), 1987/1988: 29(223-230), 1978/1989/1990: 30(231-238), 1991/1992: 31(239-246), 1993/1994: 32(247-254), 1995/1996: 33(255-262), 1997/1998: 34(263-270), 1999/2000: 35(271-278), 2001/2002: 36(279-286), 2003/2004: 37(287-294), 2005/2006: 38(295-302), 2007: 39(303-306), 2008: 40(307-310), 2009: 41(311-314), 2010: 42(315-318), 2011: 43(319-323), 2012: 44(324-327), 2013: 45(328-333), 2014: 46(334-339), 2015: 47(340-346), 2016: 48(347)
LOCKSS Archive
1963-2024
Preserved
2026-04-06
17 to 56
CLOCKSS Archive
1963-2025
Preserved
2026-04-06
ahead-of-print, 17 to 57
LOCKSS Archive
2025-2026
In Progress
2026-04-06
57, 58
Portico
2013-2013
Preserved
2026-04-09
Preserved : 2013: 45(329)
Portico
2016-2026
Preserved
2026-04-09
Preserved : 2016: 48(346-351), 2017: 49(352-357), 2018: 50(358-363), 2019: 51(364-369), 2020: 52(370-375), 2021: 53(376-381), 2022: 54(382-387), 2023: 55(388-393), 2024: 56(394-399), 2025: 57(400-405), 2026: 58(406-407)
National Digital Preservation Program, China
2017-2018
Preserved
2025-12-04
Preserved : 5 (36, 358, 359); 49 (352 to 357)
National Digital Preservation Program, China
1997-2025
Preserved
2025-12-04
Preserved : 4 (31, 37 to 39); 5 (36, 358, 359, 361 to 363); 34 (27, 263 to 269); 35 (271 to 278); 36 (28, 279, 281 to 286); 37 (29, 287 to 289, 291 to 294); 38 (3, 31, 32, 295 to 299); 39 (33 to 36); 41 (311 to 314); 42 (315 to 318); 43 (32, 319, 321 to 323); 44 (324 to 327); 45 (33, 328, 329, 331 to 333); 46 (334 to 339); 47 (34, 341 to 345); 48 (35, 346 to 349, 351); 49 (352 to 357); 51 (364 to 369); 52 (37, 371 to 375); 53 (38, 376 to 379, 381); 54 (382 to 387); 55 (39, 388, 389, 391 to 393); 56 (394 to 399); 57 (4, 41, 42)
Library of Congress
2017-2024
Preserved
2025-04-07
45 (329); 49 (353 to 357); 50 (358 to 363); 51 (364 to 369); 52 (370 to 375); 53 (376 to 381); 54 (382 to 387); 55 (388 to 393); 56 (394 to 399)