Amazon.com: HP 48SX Engineering Mathematics Library: An Introduction to Symbolic and Complex Computation with Applications: 9780123523808: Holland, John F.: Books
HP 48SX Scientific Calculator for sale online | eBay
1989 Hewlett Packard HP 48SX Calculator with Case and Guide - Tested | eBay
HP Calculators on Android, iPhone and Windows – TexasSwede
My dad bought me this HP 48SX in 1992. Still works perfectly and I still use it : r/BuyItForLife
HP-48S/SX
Hewlett Packard HP 48SX Scientific Expandable Calculator Case Manual FOR REPAIR | eBay