Environmentalists say that there are no reliable censuses of whales.

Each ethnic group claims demographic dominance, but no reliable census has been taken since 1957.

The first complete and reliable census was held in Norway.

The nation's population, a politically sensitive matter, is estimated over 100 million, but there has been no reliable census in more than two decades.

No one seems to keep a reliable census of dogs used for protection and law enforcement.

The first reliable census in India is taken.

Because a reliable census has not been taken in Burma since colonial times, the given figures are rough estimates.

The last reliable census of Burma was conducted in 1931.

In a country that has never taken a reliable census of its black population, no one has any statistics on the evictions.

Distributing revenues by population could be a difficult matter without a reliable census, which Iraq lacks.