I'm looking for input on which edition of Poucher's 'Perfumes, Cosmetics and Soaps' (any or all of the three volumes) to hunt down. I've read that the older editions are better than the new ones, but does anyone have any direct experience with them, and know which years are better? I've found second hand editions that span the '20's to the 70's. Overall, I'm after a book that has detail on the qualities of different fragrance material, natural and synthetic, and formulas. Obviously an older edition will have less synthetics listed, but that doesn't really bother me if the foundations are sound.
Thanks in advance!