I did a google search for "sobrevivir libro" and found Vivir Y Sobrevivir En LA Naturaleza. You can buy it here . The American Red Cross has lots of online documents in many languages here. Spanish is about half way down the page. Also, the FEMA library has a lot of information, but doesn't have much in Spanish. I hope this helps.
WARNING & DISCLAIMER:
SELECT AND USE OUTDOORS AND SURVIVAL EQUIPMENT, SUPPLIES AND TECHNIQUES AT YOUR OWN RISK. Information posted
on this forum is not reviewed for accuracy and may not be reliable, use at your own risk. Please
review the full WARNING & DISCLAIMER about information on this
site.