TY  - BOOK
TI  - Natural science : selections from the twentieth century : H. Poincar,̌ M. Planck, A.N. Whitehead a.o. - 2nd edition
SN  - 0-85229-531-6
PY  - 1990///
CY  - Chicago ; Auckland ; Geneva 
PB  - Encyclopd̆ie Britannica, Inc.
ER  -