Does anyone know how to access the passenger manifest for a train from Cape Town to Lourenço Marques in January 1975?

I was wondering if anyone knows if it's possible to find out the passenger manifest for a train, from Cape Town to Maputo/Lourenço Marques in January 1975? I will be able to get a closer date for Januray and I'm searching  for a Portuguese name so should be easier to identify if those records exist. Could any collector have that? Or a library or be online?

Anabela Nobre - anabela.nobre@hotmail.com.au