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500      science           ↑  500           sciences generally                 ↑  501           philosophy of science          → 001.4   ≈ ZE.0  S.SPEC.38.DC       ↑  502           professions and materials                 ↑  502.8                techniques, devices, equipment                 ↑  502.82                     microscopy                 ↑  503           scientific dictionaries and encyclopedias          → 423 603         ↑  506           scientific organizations and management                 ↑  507           science didactics, textbooks at Botta 2          → 370 510.7  ≈ T.6       ↑  509           history of science          ≈ D.1  31E

 
See also:

↑	001.4	research methods and statistics	→ 501
↑	370	education in general, pedagogy, textbooks at Physics Library	→ 507  510.7  707  ≈ :T.7
↑	423	English dictionaries	→ 503  603  ≈ :C.92
↑	510.7	mathematics teaching	→ 370  507  793.74  ≈ :T.5
↑	603	technical dictionaries and encyclopaedias	→ 423  503
↑	B.2		≈ 500
↑	C.97		≈ 503 esclusi dal prestito
↑	D.1		→ :ZE.0  ≈ 509
↑	T.6		≈ 507
↑	ZC.0		≈ 500
↑	ZE.0		→ :D  :E  ≈ 501
	AD	application of computers to teaching	≈ 507
↑	S.SPEC.38.DC	history and philosophy of science	≈ 501
↑	31E	history and philosophy of science	≈ 509