-
3591
-
3592
-
3593
A scale for household Socio-Economic Level (SEL) in the 1973 national demographic survey
Argitaratua 1975Liburua -
3594
-
3595
-
3596
-
3597
-
3598
Reforestation and silvicultural techniques for regenerating Philippine forests
Argitaratua 1975Liburua -
3599
-
3600