B1 ( New York edition ) ; also published online at NYTimes.com on October 17 , 2013 .
Wald , Matthew L. Arizona Utility Tries Storing Solar Energy for Use in the Dark , The New York Times , October 18 , 2013 , p .
B1 ( New York edition ) ; also published online at The New York Times on October 17 , 2013 .
Wald , Matthew L. Arizona Utility Tries Storing Solar Energy for Use in the Dark , The New York Times , October 18 , 2013 , p .