GV - Leisure and Recreation 4,539
G - General Geography 2,230
GA - Mathematical Geography and Cartography 1,647
GN - Anthropology 883
GB - Physical Geography 804
GT - Manners and Customs 298
GE - Environmental Sciences 273
GR - Folklore 260
GF - Human Ecology and Anthropogeography 179
C - General History 154
GC - Oceanography 127
D - General History 123
QE - Geology 65
F - General American History 28
S - General Agriculture 13
LC - Social Aspects of Education 12
TD - Environmental Technology 9
E - United States History 8
PR - English Literature 7
PZ - Fiction 7
HE - Transportation and Communications 5
TN - Mining Engineering and Metallurgy 4
SK - Hunting Sports 3
Z - Books and Writing 3
BF - Psychology 2
M - Music 2
PN - General Literature 2
QH - Natural History and Biology 2
UC - Maintenance and Transportation 2
DC - France, Andorra, Monaco 1
DS - Asia 1
DU - Oceania (South Seas) 1
JK - United States 1
ML - Literature on Music 1
N - Visual Arts 1
NC - Drawing, Design, Illustration 1
ND - Painting 1
PE - English Languages 1
PS - American Literature 1
QA - Mathematics 1
QL - Zoology 1
RC - Internal Medicine 1
SB - Plant Culture 1
TL - Motor Vehicles and Aeronautics 1
TP - Chemical Technology 1
TS - Manufactures 1
VA - Navies 1