TY  - BOOK
AU  - Haeckel,Ernst,1834-1919
AU  - McCabe,Joseph,1867-1955
TI  - The Riddle of the Universe at the close of the nineteenth century
PY  - 2013///
PB  - Project Gutenberg
N1  - Project Gutenberg; Freely available; Electronic text
UR  - http://www.gutenberg.org/etext/42968
UR  - http://www.gutenberg.org/license
ER  -