| Author | Popularity |
| Klein, Melanie, 1882-1960 |
2 |
| Klein, Viola, 1908-1973 |
2 |
| Korbinian Moeller |
2 |
| Myrdal, A. |
2 |
| A Lindstedt |
1 |
| Adéla Becková |
1 |
| Ailsa E Millen |
1 |
| Axel Buchner |
1 |
| Barbara Treccani |
1 |
| Blakeley B McShane |
1 |
| Brenda Ocampo |
1 |
| Cauer, W. |
1 |
| Celia Goffin |
1 |
| Christine K Chrystall |
1 |
| Claudio Mulatti |
1 |
| Damiano De Marco |
1 |
| Daniel Ansari |
1 |
| Dion T Henare |
1 |
| Donna Bryce |
1 |
| Dénes Szűcs |
1 |
| E Klein |
1 |
| Edward M Hubbard |
1 |
| Elise Klein |
1 |
| Elizabeth Y Toomarian |
1 |
| H Moriah Sokolowski |
1 |
| Hans-Christoph Nuerk |
1 |
| Irene Cristina Mammarella |
1 |
| J Bloechle |
1 |
| Jan Philipp Röer |
1 |
| Javier Ortiz-Tudela |
1 |
| Jiří Lukavský |
1 |
| Juan Lupiáñez |
1 |
| Juanma de la Fuente |
1 |
| Julia Bahnmueller |
1 |
| Julio Santiago |
1 |
| K Kiili |
1 |
| Kevin J Holmes |
1 |
| Klein, A. M. (Abraham Moses), 1909-1972 |
1 |
| Klein, Malcolm W. (Malcolm Ward), 1930- |
1 |
| Klein, Richard E. |
1 |
| Klein, W. |
1 |
| Krzysztof Cipora |
1 |
| Laura Mieth |
1 |
| Lincoln J Colling |
1 |
| M Ninaus |
1 |
| Marc Ouellet |
1 |
| Marek A Vranka |
1 |
| Mark S Saviano |
1 |
| Metz, L. Daniel |
1 |
| Mojtaba Soltanlou |
1 |