Re: Origami 4, try searching Amazon for Harbin Origami. One of the books that come back may be #4. You'll have to ask the seller:
1. Origami 4: The Art of Paperfolding (Paperback) ? - English ?
2. isbn 0340 218223 ?
3. Pub Year, 1977 ?
4. 186 pages.
5. Baby GRand on p. 83 or nearby.... ?
6. Blue cover with an Ostrich ?
You don't need a yes to all questions, but use your judgement.
Also, You might like " Origami: a Step by Step" by Robert HArbin, 1974, 77 pages with lots of Crawford... especially the full masted ship... ~$6 usd
In Amazon, buy two of them

Origami Step by Step (Origami) (Paperback) & secrets of Origami for $17.48
- Hank Simon