TY  - BOOK
AU  - " Sokal, R Robert ."
TI  - Principles of numerical taxonomy
T2  - A series of books in biology
U1  - 311:574 K3 
PB  - "London : W.H Freeman and company, 1963"
KW  - ". Sneath, Peter H. A"
KW  - Taxonomy
ER  -