570 - Biology 42,262 Dangos Cofnodion 510 - Mathematics 29,078 Dangos Cofnodion 540 - Chemistry and allied sciences 22,052 Dangos Cofnodion 530 - Physics 20,555 Dangos Cofnodion 590 - Animals 11,517 Dangos Cofnodion 580 - Plants 10,833 Dangos Cofnodion 550 - Earth sciences 10,155 Dangos Cofnodion 500 - Natural sciences and mathematics 4,782 Dangos Cofnodion 520 - Astronomy and allied sciences 2,889 Dangos Cofnodion 560 - Paleontology 533 Dangos Cofnodion 000 - Computer science, information, general works 6 Dangos Cofnodion 620 - Engineering and allied operations 4 Dangos Cofnodion 630 - Agriculture and related technologies 4 Dangos Cofnodion 140 - Specific philosophical schools 2 Dangos Cofnodion 050 - General serial publications 1 Dangos Cofnodion 330 - Economics 1 Dangos Cofnodion 370 - Education 1 Dangos Cofnodion 400 - Language 1 Dangos Cofnodion 610 - Medicine and health 1 Dangos Cofnodion 640 - Home and family management 1 Dangos Cofnodion 650 - Management and auxiliary services 1 Dangos Cofnodion