Stígðu inn í heim af óteljandi sögum
Óskáldað efni
This work is a textbook of fresh-water life dealing with its forms, its conditions, its fitnesses, its associations, and its economic aspects. The ecologic side of fresh-water biology is emphasized. Due consideration is given to the educational, economic, sanitary, social, civic, and aesthetic aspects of the subject.
Limnology in America today is in its infancy. The value of its past achievements is just beginning to be appreciated. The benefits to come from a more intensive study of water life arc just beginning to be disclosed. That there is a widespread interest is already manifest in the large number of biological stations at which limnological work is being done.
We recommend this volume as a general introduction to all students and teachers of this subject.
© 2019 Comstock Publishing Associates (Rafbók): 9781501740756
Útgáfudagur
Rafbók: 15 mars 2019
Merki
Yfir 900.000 hljóð- og rafbækur
Yfir 400 titlar frá Storytel Original
Barnvænt viðmót með Kids Mode
Vistaðu bækurnar fyrir ferðalögin
Besti valkosturinn fyrir einn notanda
1 aðgangur
Ótakmörkuð hlustun
Yfir 900.000 hljóð- og rafbækur
Engin skuldbinding
Getur sagt upp hvenær sem er
Fyrir þau sem vilja deila sögum með fjölskyldu og vinum.
2-6 aðgangar
100 klst/mán fyrir hvern aðgang
Yfir 900.000 hljóð- og rafbækur
Engin skuldbinding
Getur sagt upp hvenær sem er
2 aðgangar
3990 kr /á mánuðiÍslenska
Ísland