Menahot, Chapter Four, Mishnah Two
1) The [absence of either the] bullocks or the rams or the lambs does not invalidate the others.
2) Rabbi Shimon says: if they had [money enough to buy] many bullocks but not [enough for] the drink-offerings, they should bring one bullock and its drink-offerings and should not offer them all without drink-offerings.
Section one: On Rosh Hodesh and festivals, bullocks, rams and lambs are offered, together with drink-offerings consisting of wine, flour and oil (see Numbers 28:11ff and Leviticus 23:18). If the community does not bring all of these, they can still fulfill the mitzvah of the offerings that they do bring.
Section two: Rabbi Shimon points out that it is preferable to bring one bullock with its drink-offerings than to bring more animals without drink-offerings. It seems that the drink-offerings, according to Rabbi Shimon, complete the sacrifice and therefore it is better to bring one completed sacrifice than multiple partial sacrifices.