A search for particle cold dark matter (CDM) has been carried out at t
he Canfrane Underground Laboratory (Spain) with a set of three sodium
iodide scintillators of 10.7 kg each, during about 2 yr of data taking
. The results, corresponding to an exposure of 4613.6 kg day are prese
nted in the form of exclusion plots of the WIMP-target nuclei cross se
ction versus WIMP mass (both Tor spin-independent and spin-dependent W
IMP-matter interactions), obtained with the standard method of compari
ng the observed ate with the expected signal. A distinctive feature of
the CDM signal, like: its expected annual modulation, has also been l
ooked for in 1342.8 kg day of data. The nonobservance of such a modula
tion has been used to draw more stringent exclusion plots than those d
erived from the standard method.