The classification for each statement:
Dewey Decimal Classification with Hierarchy:
1. The dictionary of nineteenth-century Russian scientists
DDC: 500 (Natural sciences and mathematics)
o 509 (Historical, geographic, persons treatment)
o 509.47 (Scientists in Russia - History)
2. Lower your blood pressure: a complete guide to diet for hypertension
DDC: 600 (Technology - Applied sciences)
o 610 (Medicine and health)
o 616 (Diseases)
o 616.1 (Diseases of circulatory (cardiovascular) system)
o 616.132 (Hypertension)
o 616.1320654 (Diet therapy)
3. A dictionary of psychology
DDC: 100 (Philosophy and psychology)
o 150 (Psychology)
o 150.3 (Dictionaries and encyclopedias)
4. Barthélémy Toguo, Cameroonian paintings in Paris
DDC: 700 (Arts and recreation)
o 750 (Painting and paintings)
o 759 (Geographical, historical, areas, persons treatment)
o 759.9 (African Art)
5. Mathematics archives
DDC: 500 (Natural sciences and mathematics)
o 510 (Mathematics)
o 510.78 (Archives)
6. Spanish pronunciation
DDC: 400 (Language)
o 460 (Spanish & Portuguese languages)
o 461 (Spanish grammar)
Dewey Decimal Classification with Hierarchy:
1. The dictionary of nineteenth-century Russian scientists
DDC: 500 (Natural sciences and mathematics)
o 509 (Historical, geographic, persons treatment)
o 509.47 (Scientists in Russia - History)
2. Lower your blood pressure: a complete guide to diet for hypertension
DDC: 600 (Technology - Applied sciences)
o 610 (Medicine and health)
o 616 (Diseases)
o 616.1 (Diseases of circulatory (cardiovascular) system)
o 616.132 (Hypertension)
o 616.1320654 (Diet therapy)
3. A dictionary of psychology
DDC: 100 (Philosophy and psychology)
o 150 (Psychology)
o 150.3 (Dictionaries and encyclopedias)
4. Barthélémy Toguo, Cameroonian paintings in Paris
DDC: 700 (Arts and recreation)
o 750 (Painting and paintings)
o 759 (Geographical, historical, areas, persons treatment)
o 759.9 (African Art)
5. Mathematics archives
DDC: 500 (Natural sciences and mathematics)
o 510 (Mathematics)
o 510.78 (Archives)
6. Spanish pronunciation
DDC: 400 (Language)
o 460 (Spanish & Portuguese languages)
o 461 (Spanish grammar)
