1972- 20thcentury 338 [fic] alberta alkalicigneousrocks american animals annarbor antiquities aquaculture aquatic art arts atitlán atmosphericscience authors baikal barrett(fictitiouscharacter) biodiversity biography birds c california cavechurches champlain christianity citiesandtowns climate climatology climatologyinenviromentalscience collectionandpreservation como congo(democraticrepublic) conservationinevironmentalscience conservationofnaturalresources constance cris(indiens) denevan descriptionandtravel earthworks(art) ecologicalmanagement ecologies ecology ecosystems edmundfitzgerald(ship) ellesmere employees environmentalconditions environmentalconservation environmentalmanagement environmentalprotection environmentalscience environnement erie ethnicrelations ethnology exhibitions families ferries fiction fish fisheries folklore forestry fortification french freshwater garda gardens general geneva geochemistry george germanliterature greatriftvalley guidebooks habitatsinenvironmentalscience hiking historicbuildings historicsites historiography history history:american historyandcriticism homes hydraulicengineering hydrology inart indiansofnorthamerica indiansofsouthamerica indonesia intellectuallife interdisciplinaryaspectsofenvironmentalsciences invertibrates investigation italian italy jews junín juvenilefiction juvenileliterature kivu lac lakeecology lakeof lakeregion(lake) lakes landscapephotography legends lighthouses localhistory macedonian magmatism management march marine marineanimals marinebiology marineecology marinelife massachusetts mayas meteorology michigan microorganisms minnesota_descriptionandtravel miscellaneous miscellaneouseastafricanhistory mountainplants naturalhistory naturalresources naturalterrain navalarchitects newyork(state) newzealand oceanography oceans ohio oil oildrilling ojibwaindians ouvragesillustrés participationdescitoyens photographyingeography pictorialworks plantecology plants pollution ponds postcards protection protectionofhabitats protectionofnaturalresources protectionofplants purification pèlerinageschrétiens quinsigamond recreation region region(congoandrwanda) region(macedoniaandalbania) region(walworthcounty:lake) relations religion restoration russia(federation) rwanda saintann sanctuaireschrétiens scubadiving selwyndistrict shipwrecks siberia simon sociallifeandcustoms state studies submarines(ships) superior supérieur sylvain tahoe teluk tesson tiwanakuculture trainferries travel traveltesson trentino-altoadige unitedstates veronica victoria water waterquality weddings wetlandecology wisconsin womenteachers zoology