Trying to find several fields

Newbie to the API here.  I'm trying to find quite a few fields, and it is not apparent how I would find them, nor where I would look.  Specifically, this is the list of fields I wish to get:

search_date
keyword
account
campaign
group_name
match type
status
search_bid
pub_cost
clicks
impressions
click_through (can be calculated: clicks/impressions)
cpc (can be calculated: pub_cost/clicks)
position
url
domain

I am using the Perl sample code from https://developers.google.com/adwords/api/docs/samples/perl/basic-operations and I can get fields like keyword and account, but how would I find impressions, clicks, and position?  These are not attached to the Google::Ads::AdWords::(version)::Keyword object.

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