. "Prokop" . "17143284"^^ . . "male" . . "2017-07-28" . . . . . "2018-02-27" . . . . . "Darren Prokop"@fr . "Concepts of transportation economics / Barry E. Prentice, Darren Prokop, 2016. - . - LC Authorities. - http://id.loc.gov/authorities/names/n2014000735. - 2017-08-27"@fr . . "Darren" . . . "Darren Prokop" . .