The mines themselves are of great speleological and historical interest.

However, there was a keenly felt need for a speleological organization in the country.

The speleological clubs obtained new equipment, and their activity increased.

A more thorough speleological investigation was done in 1976.

We will mention some of the most interesting speleological objects in the National Park.

The first national speleological conference took place in Mazamet in 1939.

He also made regular trips abroad to conduct lectures on speleological subjects.

In his research he investigated earthquakes, speleological objects, and coal findings.

By the late 1950s he was director of the Western Speleological Survey.

He talks about 'embarking upon the greatest speleological expedition in history', but as yet has not explained himself.

It was quite controversial for Malez to mention only the state institutions and some companies related to speleological activities.

The natural monument upland of Cariadeghe is very important for its environmental and speleological features.

The Aude has many natural and underground caves suitable for speleological exploration.

In addition to archaeological value, the cave has great speleological and paleontological value.

It represent one of the most important innovation of Castellana's speleological complex.

Collet began his speleological career in 1962.

Speleological activities are also available, with about 15 caves over 150 metres deep catalogued in les Frêtes.

The results of speleological explorations carried out in 1960 on the Arabika limestone massif.

The Bulgarian Speleological Society became more active after 1947.

After 1949 the Bulgarian Speleological Society ceased its activities over a brief period of time.

In "I, Roger Williams," the showiest research is linguistic rather than speleological.

He found refuge in a field that he felt he could improve on in his country: speleological science.

There are several speleological studies conducted on the karst topology around Solunska glava.

Sierra Salvada is known through its limestone area and the speleological researches done there by the caving groups.

The first Bulgarian Speleological Society was founded on March 18, 1929.