geologów

In a sentence

• Książka dotyczy pracy geologów.

  The book discusses the work of geologists.

  The word 'geologów' here is in the genitive plural form, used to indicate the group of geologists whose work is the subject of the book.

• Spotkaliśmy grupę geologów na konferencji.

  We met a group of geologists at the conference.

  In this sentence, 'geologów' is in the accusative plural form because it describes the direct object of the verb 'spotkaliśmy' (we met).

• Podziękowano za wysiłki geologów w badaniach.

  The efforts of geologists in research were acknowledged.

  Here, 'geologów' is in the genitive plural form, indicating possession (the efforts belonging to the geologists).