Fig. 5From: Indoor/outdoor particulate matter concentrations and microbial load in cultural heritage collectionsSeasonal variation of the PM2.5 and PM10 (μg/m3) concentration in the Historical Museum of Crete in Heraklion, the Criminology Museum of the University of Athens and the Neophytos Doukas Library in Zagori during the measurement 2 year period (March 2013–February 2015) at a outdoors; b indoors; and c showcases)Back to article page