Part II
The Continuum Concept - Jean Liedloff (ISBN 0-14-019245-X) Arkana/ 2001 (Child birth & Child care: This is my wife's handbook as a health visitor)
Most of these books were written by Doctors. You should be able to get copies - even if only second hand over the internet at Amazon etc., that is if you haven't come across some of them before (I'm 57 and in England, so came across them all - you may be younger and where you live, might not have published some of them).
PS Got some nice artwork (self-created) that demonstrates my belief on the depression/ elation effect, let me know if you'd like to see the pair and if you can take them or if you have download limits and can't (Can post, if you give me a snail mail address or you can visit the following link
Box.net | Simple Online Collaboration: Online File Storage, FTP Replacement, Team Workspaces ~ Free Version)