H Est-
Aa The Bible and its sections
Ab Hymn books, prayer and gospel books
Ac-Ad Devotional songs
Ae Catechisms
Af Liturgical handbooks
Ag Commentaries, reading guides and dictionaries for the Bible
Ah Sermon books and devotional books
Ai Orthodox books
B Philosophy and education
Ca General history
Cb Estonian history
D Printing houses, Publishing operations, Book trade
E History of literature
F Alphabet books and reading guides
G Grammar books and dictionaries
H Social studies
I Temperance
K Economy and technology
L Geography and natural sciences
M Medicine and health care
N Fiction and poetry
O Albums and yearbooks
P Songs and opera texts
R Self-help books
S Almanacs and calendars
T Periodicals
U Unclassified small booklets