$a Kp. Textbook of pollen analysis / by Knut Faegri and Johs. Iversen. - Chichester, 1989.
670
$a Kp. The principles of pollination ecology / by K. Faegri and L. van der Pijl. - 2nd rev. ed. - Oxford, 1971.
670
$a Kp. Textbook of pollen analysis / by Knut Fægri and Johs. Iversen. - 4th ed. repr. / by Knut Fægri, Peter Emil Kaland and Knut Krzywinski. - Chichester [etc.], 1992.