Please use the chapter download feature from the table of contents if you wish to download PDFs of book sections that you can keep forever.
Using the "Download Book" option, which requires an Adobe Digital Editions account, will make these books unavailable to others during the checkout period and the downloaded copy will delete itself from your device when the 3 day checkout period is over.
One print copy of each of these books is available in Lied Library.
Some of these are available for one hour checkout from the Internet Archive Open Library. You'll need to set up a free account on their site to access the complete book for a one hour borrowing period.
available online from Internet Archive
Create a free account with the Internet Archive for full access - use "borrow for 1 hour" option.