"Preliminary study of the chemical composition of rainwater in Northeastern México"
Journal article published in 2007 by
E. Ramírez Lara,
R. Miranda Guardiola,
G. Trujillo De Santiago 
,
H. Bravo Álvarez,
R. Sosa Echeverría,
P. Sánchez Álvarez,
A. Alarcón,
J. Kahl
,
H. Bravo Álvarez,
R. Sosa Echeverría,
P. Sánchez Álvarez,
A. Alarcón,
J. Kahl
