Alien: Facehugger drawing attributed to Ron Cobb

leading from

Ron Cobb's art
and 
Alien: The Facehugger

An odd drawing of the Facehugger turned up a few years ago and was said to be by Ron Cobb.

However it also turned up displayed with egg at the EMP Museum in Seattle, Washington. 

I can't see if there's information about its source

Sketch of facehugger turns up displayed with 
egg at th EMP Museum in Seattle , Washington.
(Source: www.tripadvisor.com.au)

Sketch of facehugger turns up displayed with 
egg at th EMP Museum in Seattle , Washington
(Source: www.tripadvisor.com.au/