60 years ago, Soviets launch Sputnik 3 | NASA
Sputnik ii hi-res stock photography and images - Alamy
The “Simplest Satellite” That Opened Up the Universe | American Scientist
Launch of Sputnik 2 : NASA : Free Download, Borrow, and Streaming : Internet Archive
This Month in Astronomical History: Launch of Sputnik 2 | American Astronomical Society
Sputnik 2, scale model - Stock Image - C024/7446 - Science Photo Library
Sputnik-2
Sputnik 2 - Wikipedia
Sputnik-2
Sputnik 2 (PS-2 #1) - Gunter's Space Page
File:Sputnik-2 model.jpg - Wikimedia Commons
Sputnik 2: The First Animal in Orbit | Drew Ex Machina
STL file Sputnik 2 Laika Capsule Cutaway And Assembly Printable Model・3D print design to download・Cults
The First Earthly Being Sent in Outer Space | History of Yesterday
NASA - NSSDCA - Spacecraft - Details
When Soviets Launched Sputnik, C.I.A. Was Not Surprised - The New York Times
Sputnik 2 launches carrying Laika, November 3, 1957 - EDN
Sputnik | Satellites, History, & Facts | Britannica
60 years ago: The First Animal in Orbit | NASA
60 years ago: The First Animal in Orbit | NASA
Korabl-Sputnik 2: The First Animals Recovered from Orbit | Drew Ex Machina
Sputnik
Sputnik 2: The First Animal in Orbit | Drew Ex Machina
Sputnik-2
The veracity of early rumors about Soviet space ventures
