Classification
ABM - Special subject biographies
22
ABH - National biographic catalogues - non-Europe
16
ABA - General international and supranational biographic catalogues
13
ALD - Biographies of scientists and Nobel prize winners - collected
11
AQW - Biographic indexes with references
2
CAD - Chemistry - comprehensive works
2
AED - Official corporations - international and supranational
1
AHZ - History of science and technology
1
CAA - Chemistry - reference books
1
HAA - Medicine - reference books
1
LAL - Biology - general aspects
1