A few of my collected links!

 https://comicbookplus.com/?cid=1507

All the comic books you grew up with and some you never heard of!  Hours and hours and hours of good old fashioned fun!  I first discovered this site I felt like I was back at Renick's Drug Store sitting on the floor reading comics!!  My boss, however, wasn't Mr. Renick!!!

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https://www.gutenberg.org/

https://archive.org/

Truly....darn near ANYTHING you ever wanted to read.  If it is digitized....it is probably available on one of these two sites!

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https://historicalcharts.noaa.gov/search.php

Need a map of a beach or inlet or bay or...(you get the picture).  Use the above!

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https://www.loc.gov/collections/railroad-maps-1828-to-1900/articles-and-essays/browse-maps-by-state/

Historic maps of the US via the Library of Congress

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https://www.fs.usda.gov/visit/maps

Need a topographical map?  Used this site many times in my land hunt!

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https://www.vintageprojects.com/

Cool old projects from Popular Mechanics and other sources.  A few of these are on my dream list to build!  

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http://seasonedcitizenprepper.com/preparedness-downloads/#medicine

http://www.ps-survival.com/PS/index.htm

http://www.survivorlibrary.com/library-download.html

https://www.reddit.com/r/Survival/comments/732c79/ive_collected_a_bunch_of_free_survival_pdf_links/

https://the-eye.eu/public/murdercube.com/

https://patriotrising.com/survival-pdf-files-manuals-guides/

Survival and Prepping links.  Seriously, if it is not in one of the links above...it hasn't been written down!