Sentence:  Under the first of these, 5 collaborative research training fellowship projects were approved, on the following topics: stages of expansion of the railroads in Peru and their impact on its economy, under <WSD>codirection</WSD> of Heraclio Bonilla, Institute of Peruvian Sudies, Lima, and Marcello Carmagani, Luigi Einaudi Foundation, Turin Italy;... 
Meaning of the word marked with <WSD> tags:  joint direction of a film, organization, venture, etc.