Complex sentence: The IMA referred it to the AIPEA (Association Internationale Pour l'Étude des Argiles) for advice and it was approved by the AIPEA (Nomenclature Committee) at its Tokyo meeting (1970).
Split into simpler sentences: The IMA referred it to the AIPEA (Association Internationale Pour l'Étude des Argiles) for advice. It was approved by the AIPEA (Nomenclature Committee) at its Tokyo meeting (1970).