Toby Chester
→Convergence in late 20th century
23:18
-561
DavidB4-bot
→Convergence in late 20th century: HTTP --> HTTPS [#1], replaced: http://dx.doi.org → https://dx.doi.org (2)
18:09
+2
→China: correcting hyphen usage, as requested, replaced: th-century → th century
16:21
Spelling/Grammar Check, typos fixed: However → However, , et al → et al., 1930's and 1970's → 1930s and 1970s
17:42
clean up & uniformity
15:21
+17
RJJensen
drugs
07:29
-24
new article
03:18
+23,597