TY  - BOOK
AU  - Pickering,Edward C.
TI  - A Plan for Securing Observations of the Variable Stars
AV  - QB 
PY  - 2011///
PB  - Project Gutenberg
KW  - Variable stars
N1  - Public domain in the USA; Electronic text
UR  - http://www.gutenberg.org/ebooks/35613
ER  -