TY  - BOOK
AU  - Engels,Friedrich
TI  - Dialectics of nature
AV  - Q175 .E473 1972
U1  - 501 
PY  - 1972///]
CY  - Moscow
PB  - Progress Publishers
KW  - Science
KW  - Philosophy
KW  - Dialectical materialism
N1  - Translation of Dialetik der Natur; Bibliography: p. [374]-[382]
ER  -