Perhaps you should try some spelling variations:
personal communications » personal communication, interpersonal communications, internal communications
communications 1901 » communications 19.3.1, communications 1, communications 14
au developpement » du developpement, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
typologie die » typologie des, typologie der, theologie die
die variation » de variation, does variation, der variation
des personal » des personals, der personal, das personal
1901 au » 1901 auf, 1901 a, 1901 tab

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: typologie die variation _ des personal communications 1901 au developpement en afrique.*.