Hello Sergio - Many of the publications listed in our bibliography are available for free download - all of these: https://www.avo.alaska.edu/downloads/classresults.php?frommain=yes&title=&lastname=&firstname=&year=&volcano=-1&limit=25&online=on Hope this is helpful, Thank you, Cheryl Cameron -------- Sergio Flores wrote: How can I purchase books or brochures from your library? Could you send a list of these material and the price of them? Thank you for your attention. All these items are for our library. -- Cheryl Cameron Geologist, Alaska Volcano Observatory Alaska Division of Geological & Geophysical Surveys voice: 907-451-5012 fax: 907-451-5050