using query with importRange() - "Unable to parse query string for Function QUERY parameter 2: NO_COLUMNF"

I have tried lots of permutations and keep hitting a wall. Why don't this work.

Step 1, this works:

=IMPORTRANGE("https://docs.google.com/spreadsheets/d/blablabla/edit#gid=blablabla","combined!A1:F10")

Produces:

ga:year ga:month    ga:source   ga:medium   ga:campaign ga:goalCompletionsAll
2013    6   #3 Announcement of new titles   email   iPad title announcement 1
2013    6   (direct)    (none)  (not set)   3948
2013    6   0fb72887-fb60-4d86-b8e2-9990801bc83e    (not set)   wda 0
2013    6   1.1.1.1 referral    (not set)   0
2013    6   1.1.2.1 referral    (not set)   0
2013    6   10.122.101.1    referral    (not set)   0
2013    6   10.14.163.91:8080   referral    (not set)   0
2013    6   10.15.0.1   referral    (not set)   0
2013    6   10.173.0.1  referral    (not set)   0

So far so good.

My actual data set is tens of thousands of records long. I want to count(*) initially on this sample set:

=QUERY(IMPORTRANGE("https://docs.google.com/spreadsheets/d/blablabla/edit#gid=blablabla","combined!A1:F10"),"SELECT COUNT(F)",1)

Gives:

Unable to parse query string for Function QUERY parameter 2: NO_COLUMNF

=QUERY(IMPORTRANGE("https://docs.google.com/spreadsheets/d/blablabla/edit#gid=blablabla","combined!A1:F10"),"SELECT COUNT(*)",1)

Gives:

Unable to parse query string for Function QUERY parameter 2: PARSE_ERROREncountered "*" at line 1, column 14. Was expecting one of: "min" ... "max" ... "avg" ... "count" ... "sum" ... "no_values" ... "no_format" ... "is" ... "null" ... "year" ... "month" ... "day" ... "hour" ... "minute" ... "second" ... "millisecond" ... "with" ... "contains" ... "starts" ... "ends" ... "matches" ... "like" ... "now" ... "dateDiff" ... "quarter" ... "lower" ... "upper" ... "dayOfWeek" ... "toDate" ... <ID> ... <QUOTED_ID> ...

=QUERY(IMPORTRANGE("https://docs.google.com/spreadsheets/d/blablabla/edit#gid=blablabla","combined!A1:F10"),"SELECT COUNT F",1)

Gives:

Unable to parse query string for Function QUERY parameter 2: PARSE_ERROREncountered "F" at line 1, column 14. Was expecting one of: <EOF> "where" ... "group" ... "pivot" ... "order" ... "skipping" ... "limit" ... "offset" ... "label" ... "format" ... "options" ... "," ... "*" ... "+" ... "-" ... "/" ... "%" ... "(" ...

=QUERY(IMPORTRANGE("https://docs.google.com/spreadsheets/d/blablabla/edit#gid=blablabla","combined!A1:F10"),"SELECT COUNT('ga:goalCompletionsAll')",1)

Gives: Unable to parse query string for Function QUERY parameter 2: PARSE_ERROREncountered "\'ga:goalCompletionsAll\'" at line 1, column 14. Was expecting one of: "min" ... "max" ... "avg" ... "count" ... "sum" ... "no_values" ... "no_format" ... "is" ... "null" ... "year" ... "month" ... "day" ... "hour" ... "minute" ... "second" ... "millisecond" ... "with" ... "contains" ... "starts" ... "ends" ... "matches" ... "like" ... "now" ... "dateDiff" ... "quarter" ... "lower" ... "upper" ... "dayOfWeek" ... "toDate" ... ... ...

And I've tried lots of other things. Keep getting errors.

When I'm inside the sheet in question and run the query, it works. It's only when I try to import it causes problems. But if you look at the first function I wrote I can import the data.

What gives?