astronomie, underwater archaeology, physical geography, pneumology, hydraulic engineering, language teaching, ikt, vaudois, biologie, oceanology, enea, cospar, joliot, palaeoanthropology, rhodope mountains, rhin, yersin, pannonia, allergology, angiology, steiermark, emmy noether, geochronology, philosophie, ethnologist, lappland, sssr, antiquaries, guianas, hallstatt, chelonia, petroleum geology, emanuel swedenborg, mycologist, volcanological, lake onega, cambrian mountains, exarch, huascaran, pannonian, gerardus mercator, heinrich boll, ecol, courland, louis agassiz, moral philosophy, hydrometeorology, regione, bodensee, mendeleyev, boojum, sierra morena, ethologist, physical anthropology, youth hostel, thuringen, lucern, geomorphology, indology, jan mayen, italica, meteoritics, dinosauria, cycliste, studium, cattle breeding, transylvanian alps, astron, hydrobiology, mining geology, francois rabelais, altai mountains, horizont, tristan da cunha, bienne, fise, radioastronomy, charta, hypogeum, monte bianco, aktyubinsk, forel, unio, oceanica, reinette, mineralogist, bernese alps, alpinism, malpighi, kristianstad, natation, ultima thule, palaeontology, gulbenkian, lawn tennis, glaciology, lwow, livonian, jylland, lake ladoga, biometeorology, ukr

avocation, by-line, geology, hobby, sideline, spare-time activity

spelaeology