Lah Gunnar
Lammertink Marinus Chr.
Landers, Jr. Edward A.
Larson Lars
Launaro Fabio
Le Clerco Pierre A. L. M. G.
Lebreton Vincent
Lee Larry Mason
Leine & Konig
Lewer Hans
LME Petroscope Limited
Locher & Cie AGZZ
Lugovtsov Anatoly S.
Lunardi Pietro
Lutgendorf Hans-Otto