Archive.org unfortunately no longer generates DjVu files, but how did they generate them when they did? How can I generate my own DjVu files, replicating the settings they use:
FORM:DJVU [81493]
INFO [10] DjVu 1835x2927, v25, 300 dpi, gamma=2.2
CIDa [36]
Sjbz [13595] JB2 bilevel data
FG44 [1652] IW4 data #1, 100 slices, v1.2 (color), 153x244
BG44 [15684] IW4 data #1, 74 slices, v1.2 (color), 612x976
BG44 [15946] IW4 data #2, 10 slices
BG44 [10783] IW4 data #3, 4 slices
BG44 [23422] IW4 data #4, 9 slices
TXTz [287] Hidden text (text, etc.)
(I know they use ABBYFineReader, but I'm not interested in OCRing; so, I'm not interested in making DjVus with the TXTz layer.)