TY  - BOOK
TI  - Universal decimal classification. UDC 55/59 : : geology, geophysics, palaeontology, biology, botany, zoology
PY  - 1955///
CY  - London : 
PB  - British Standards Institution, 
KW  - Botanica
KW  - Biologia
KW  - Zoologia
KW  - Cdu
KW  - Clasificacion Decimal Universal
ER  -