El sistema de gobierno dual de Argentina y su origen,

"Memoria presentada ... al II Congreso científico latinoamericano en Montevideo ... [y] en la tercera reunión del Congreso científico latinoamericano verificada en Rio de Janeiro."

Tests of the dual differential radiometer under field conditions /

Issued Aug. 1978.

Conventional and advanced sewer design concepts for dual purpose flood and pollution control : a preliminary case study, Elizabeth, New Jersey /

Mode of access: Internet.

Dual process high-rate filtration of raw sanitary sewage and combined sewer overflows /

Mode of access: Internet.