. . . . . . . . . . . "Problems, exercises, etc" . . . . . . . . "Examples in quantitative zoology" . "Handboeken (vorm)" . . . "Problems and exercises" . . . "Quantitative zoology" . . "Examples" . . . "Quantitative Zoology." . . . . "Biometrie." . . "Biométrie." . "Biometry Problems, exercises, etc." . . "Zoologie Mesure." . . "Dierkunde." . . "Biometry" . . "Biometry." . "Biométrie Problèmes et exercices." . . "Mathematics" . . "Mathematics." . "Zoología Modelos matemáticos." . . "Zoology" . . "Zoology." .