General Nature in 1990

Science in Action by Lenihan

Under Technology's Thumb by Leiss, William

Ecological Relationships of Plants and Animals by Howe, Henry F., Westley, Lynn C.

The Valuation and Investment Merits of Diamonds by Khoury, Sarkis

The Works of Charles Darwin: Subset by Darwin, Charles

Secret Worlds of Colin Fletcher by Fletcher, Colin

Mac's Field Guides: Northeast Coastal Fish by Macgowan, Craig

Langston Hughes by Mikolyzk, Thomas A.

Mac's Field Guides: Northeast Park & Backyard Birds by Macgowan, Craig

Mac's Field Guides: North American Land Mammals by Macgowan, Craig

Edible Wild Plants of Pennsylvania and Neighboring States by Medve, Richard J., Medve, Mary Lee

Mammals of the Pacific States: California, Oregon, Washington by Ingles, Lloyd G.

Die Mineralien Der Schweiz: Ein Mineralogische Führer by Weibel, Max

Identifying Wood: Accurate Results with Simple Tools by Hoadley, R. Bruce

Natural History of the Antarctic Peninsula by Moss, Sanford

Giving Birth to Thunder, Sleeping with His Daughter by Lopez, Barry H.