early concepts for the nostromo were very odd.

Source of these images?

an official book: alien the archive.

Yes please cite the source. 

date / publication / author

Publisher: titan books,date: october 28 2014, auther: Mark Salisbury.

Pretty sure it is official.

Amazon link?

https://www.amazon.com/Alien-Archive-Ultimate-Classic-Movies/dp/1783291044

here is the cover.

Looks like a great book. 

I think he collected some of the original concept art for the book. I am not sure though. he comes up as the auther.

Right on. Love those old-school spacecraft drawings. 

cool. good stuff Timmy the ultramorph. They definitely ended up with a winning design 

People can just Google "Ron Cobb Alien Concept" even add ships and it will find these for you.

Its interesting as some of his work was clearly influential in Alien Covenant, from slight similarities with the Lander and some of his work, to the same with the Covenant ship which i had mentioned and shared some of those images in a previous post prior to AC hitting the Box Office...   Also the Covenant Bridge is very similar to some of Ron Cobbs Nostromo Bridge concept works.

Lucky they never used Ron Cobbs Alien Monster Concepts though lol

Yes, some Ron Cobb designs and the second image is by Chris Foss. They were first included in The Book of A L I E N by Paul Scanlon and Michael Gross.

1st Edition

Titan Books New Edition May 2012

I have 2 copies of both editions as that's the kind of geek I am!

I don't find them odd at all. What you have there are some classic late 70's designs!

Great topic again Timmy the ultramorph.

I love this one.

A very astute collection you have there Lone. My compliments.

I got this book on Amazon Prime day for a whopping $20 shipped.  It has some stuff I have never seen before.  Surprisingly Alien Resurrection had really cool pics and concepts to view.