Materia
SB Plant culture
223
S Agriculture (General)
158
Q Science (General)
38
SD Forestry
36
QK Botany
24
QL Zoology
24
SF Animal culture
23
GE Environmental Sciences
21
QH301 Biology
16
QD Chemistry
8
G Geography (General)
7
QR Microbiology
7
L Education (General)
5
T Technology (General)
5
TP Chemical technology
5
HD28 Management. Industrial Management
3
AC Collections. Series. Collected works
2
HB Economic Theory
2
HD Industries. Land use. Labor
2
SH Aquaculture. Fisheries. Angling
2
F1201 Latin America (General)
1
GC Oceanography
1
GV Recreation Leisure
1
H Social Sciences (General)
1
HA Statistics
1
HT Communities. Classes. Races
1
LB2300 Higher Education
1
QH426 Genetics
1
QP Physiology
1
QR180 Immunology
1
QR355 Virology
1
R Medicine (General)
1
RV Botanic, Thomsonian, and eclectic medicine
1
TD Environmental technology. Sanitary engineering
1
TS Manufactures
1
TX Home economics
1