Here's a link to a PDF file featuring the 1956 Slidell Phone Book residential listings. These pages were scanned over 10 years ago from a photocopy of the 1956 original, so I apologize for the poor quality. For the most part, it is readable. Disclaimer: These pages are for historical purposes only and should not be used for actually calling anybody. The numbers are most likely different now, 60 years later.
CLICK HERE for the 1956 Slidell Phone Book residential listings.
The business directory of the same phone book is located AT THIS LINK.