« first day (2873 days earlier)      last day (587 days later) » 

6:59 AM
@mattdm Apparently lots of expensive books about nonlinear optics...
 
 
5 hours later…
11:47 AM
@xiota Expensive because they're not really meant to sell — those are people's theses.
 

« first day (2873 days earlier)      last day (587 days later) »