Subject
- Kekulé, August, 1829-18962
- Kentron Pyrēnikōn Ereunōn "Dēmokritos"1
- Korea (South)1
- Krypton1
- Laboratories--Equipment and supplies1
- Latex1
- Lavoisier, Antoine Laurent, 1743-17941
- League of Arab States1
- Liebig, Justus, Freiherr von, 1803-18731
- Light--Wave-length1
- Lilienthal, Otto, 1848-18961
- Lorentz, H. A. (Hendrik Antoon), 1853-19281
- Luxembourg1
- Macdonald, J. R.1
- Malaria1
- Malaria--Treatment1
- Malaysia1
- Mali1
- Marshall Islands--Bikini Atoll1
- Martinique1