Rehab Question: How to removing glue from hardwood floors?

[Zach Schwarzmiller]

It appears that at one point someone had put linoleum floor over the top of hardwood floors in a room inside a house I am currently remodeling. There was a 1/8" thick yellow later under the carpets I ripped out which appear to have glue under it. I've scraped it the best I can but now seem to need to get something to dissolve the glue and then probably sand it. I don't need this to look nice, I already have a renter and an agreement that the floor will not look amazing; however, it can't be left with glue on it. I thought about putting carpet over the top, but that was more expensive than I want to go with this. The room is 165"x150".

Here is a couple photo’s to give this some context:

https://www.dropbox.com/s/p6x1o9arupn05e1/IMG_20140421_183801.jpg

https://www.dropbox.com/s/81p6jfccbdudj7v/IMG_20140421_183806.jpg

Any suggestions greatly appreciated! Looking for a quick, cheap, easy(ish) fix.