3DS vs PSP – VGChartz Gap Charts – October 2018 Update
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Switch vs DS – VGChartz Gap Charts – October 2017 Update
Graph-Age: Worldwide NDS & PSP cumulative monthly sales & shipments by region! | NeoGAF
On the 802 11 Turbulence of Nintendo DS
PS Vita being outsold by the PSP in Europe too | eTeknix
The first 2 years: PSP has sold better in the US than PS1, DS, more | Engadget
Nintendo DS vs. The Sony PSP - InfiniGEEK
NPD Seventh generation | Video Game Sales Wiki | Fandom
The latest global console sales list! NS only ranked 13th, first is PS2 | Luju Bar
Nintendo 3DS Reaches 5 Million In Japan, Breaks Record - Siliconera
Japan's October Hardware Sales | TheSixthAxis
Sony PSP Versus Nintendo DS - The Sales Showdown - Pure Nintendo
Popularity of Nintendo DS Begins to Curb, PS3 Sales on the Rise in Japan | TechPowerUp
Nintendo's Switch to Success: 20 Years of Nintendo Console Sales
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Gamasutra - Exclusive: Sony PSP Versus Nintendo DS - The Sales Showdown
Who won? First-week sales of PS Vita vs. PSP vs. 3DS vs. DS (infographic) | VentureBeat
Report: PSP game sales robust, DS sales amazing | Ars Technica
PSP vs. Nintendo DS – Closest Race Since SNES vs. Genesis
Gamasutra - The Mushroom Growth Plan: Inside Nintendo's Numbers
Apple slams PSP, DS at iPhone/iPod conference - GameSpot
Nintendo Didn't Expect 3DS Sales to Drop Like This | WIRED
Garaph - DS vs PSP
Nintendo vs Sony: Who's winning the console war in handheld gaming? | IG EN
PS4 vs DS Sales Comparison – PS4 Closes the Gap in June 2020
