PL - Eastern Asia, Africa, Oceania 712
PE - English Languages 446
PN - General Literature 190
P - Philology and Linguistics 127
PR - English Literature 61
PS - American Literature 49
PZ - Fiction 37
PJ - Oriental 30
PH - Uralic, Basque Languages 26
PQ - French, Italian, Spanish, Portuguese Literature 3
PB - Modern and Celtic Languages 2
PC - Romanic Languages 1
PD - Germanic Languages 1