On Apr. 12, Robert Vignali posted a list of some of the older literature.
A slightly more recent one is "Formation of the pronephros and pronephric
duct rudiment in the Mexican axolotl" Journal of Morphology 185:217-222
(1985). It also includes a few early references that might not have been
on his list. [Unfortunately, our mailer does not allow me to view or copy
the text of the original message when I use "reply".]
John Armstrong e-mail: jbarm at acadvm1.uottawa.ca
Department of Biology
University of Ottawa
Ottawa, Ontario K1N 6N5
CANADA