Heidenreich L.L. Methods of research on lower organisms for doctors natural scientists veterinarians students and doctors natural scientists veterinarians students and others with 150 drawings in the text./Geydenreykh L.L. Metody issledovaniya nizshikh organizmov dlya vrachey estestvoispytateley veterinarov studentov i dr.vrachey estestvoispytateley veterinarov studentov i dr. S 150 risunkami v tekste.. E6