[igraph] nodelist file format into a graph

[Ragia .]

greetings,
kindly, 
how can I convert the following format (if it is in a f.csv) ..into a graph 
object (R based)

nid     nom1    nom2    nom3
1       87      90      110
2       11      55      98
3       20      29      37
4       33      94      103
5       52      56      61
6       29      31      43
7       23      94      106
8       36      55      111
9       3       23      29

...

 where nid  is the person’s ID and norm1 , norm 2...  are the nominations to 
other IDs


thanks in advance
Ragia