|
2
|
|
Chemical Congress of North America (4th : 1991) / http://id.loc.gov/authorities/names/n88168975
|
1993
|
1
|
|
3
|
|
Chemical Congress of North America (4th : 1991 : New York, N.Y.) / http://id.loc.gov/authorities/names/n88168975
|
1993
|
1
|
|
4
|
|
Chemical Congress of North America (5th : 1997 : Cancun, Mexico) / http://id.loc.gov/authorities/names/n88168975
|
1998
|
1
|
