DB Nomalization question

I'm having a little problem with the normalization of the db I'm trying to setup for my website. (for a tradinghouse)
I have two entities Product (product data) and Contact (a table of company data (name, phone, address etc) of customers, supplier etc.))
One Product attribute is supplierID and another eventually customerID so that means two relations between the two tables.
I can even think of a third relation namely locationID (location of product)
How do you describe such a relation (1 to many) or (many to many) or just 3 (1 to many) relations.
I don't know enough of this normalization theory maybe there is someone around that can help me a bit.

Regards TheMike

Well a one-to-one relationship is the typical primary to foreign key link. One-to-many infers that one field is related to multiple tables, for example, like this:

people
________
personId
name
age

groups
________
groupId
groupName
personId

groupMembers
___________
gmId
groupId
personId

IN the tables above, the personId table has a one-to-many relationship because its personId field ties it in with the groups table. Its personId field ties it with the groupsMembers table also.

If you're interested in learning more about database normalization then see these links:

http://www.wdvl.com/Authoring/DB/Normalization/
http://www.phpbuilder.com/columns/barry20000731.php3
http://www.swynk.com/friends/faour/databasedesign1.asp

personId does not belong to this table. It is clearly just a typo

The links arew good, but the example is more confusing than good between the typo (sylow noticed) and bad info. People and Groups clearly have a MANY to MANY relationship via an intermediary table (to which they have one to many relationship). This is good normalization of a many to many but just not labelled properly. One to many is not indicative of the number of tables linked, but the number of related records in the other table to which the relationship is referring.

From the description of the problem itself, I couldn't clearly answer the question at hand either... Just wanted to caution on the previous info in the thread.

1 to 1 is
PK to PK

1 to many is
PK to FK

many to many is
Pk to Linking Tables's FK and
Linking Tables's FK to PK
(has 3 tables)

so

Table 1 | Table 2 | Table 3
ID1 ->>> ID1
ID2 ->>> ID2

Table 2 is the linking table