"Chronicles of the Gringos" mentions Mexican numbers and types of artillery on pp. 143-144. Will abstract this for you.
Heitman mentions US Regulars involved in Vol. 2, p. 400.
Please also check with the Descendants of Mexican War Veterans (link below)for additional information.
A Mexican source is Museo Nacional de Historia, Mexico, D.F. (Tel: 0052 5 286-9920).
To Join the Company of Military Historians click here