 | Dahlias. | (1) |
| Dairy cattle Hawaii. | (1) |
| Dairy cattle Manure Handling. | (1) |
| Dairy cattle Standards. | (1) |
| Dairy cattle United States Statistics. | (1) |
| Dairy farming Economic aspects North Carolina. | (1) |
| Dairy farming Michigan. | (1) |
| Dairy farms Delaware. | (1) |
| Dairy farms Delaware Management. | (1) |
| Dairy farms Economic aspects Delaware. | (2) |
| Dairying. | (1) |
| Dairying Economic aspects. | (1) |
| Dairying Economic aspects Hawaii. | (1) |
| Dairying Economic aspects Northeastern States. | (1) |
| Dairying Israel. | (1) |
| Dairying Michigan. | (1) |
| Dairying Middle West. | (1) |
| Dairying Minnesota Finance. | (1) |
| Dairying North Carolina Costs. | (1) |
| Dairying United States Statistics. | (1) |
| Dairy plants. | (1) |
| Dairy plants Automation. | (2) |
| Dairy plants Minnesota. | (1) |
| Dairy products. | (1) |
| Dairy products Alabama. | (1) |
| Dairy products Economic aspects United States. | (1) |
| Dairy products Marketing. | (1) |
| Dairy products Prices United States. | (1) |
| Dairy products Standards United States. | (1) |
| Dairy products United States. | (1) |
| Dairy products United States Marketing. | (1) |
| Dairy products Wyoming. | (1) |
| Dampness in buildings. | (1) |
| Data processing service centers Georgia. | (1) |
| Date United States. | (1) |
| DDT (Insecticide) | (1) |
| Decks (Architecture, Domestic) | (1) |
| Deer Food. | (2) |
| Deer Middle West Congresses. | (1) |
| Deer Minnesota. | (1) |
| Dehorning. | (1) |
| Desert ecology Utah Millard County. | (1) |
| Desert flora Utah Millard County. | (1) |
| Dichlorophenoxyacetic acid. | (1) |
| Diet United States. | (2) |
| Differential equations. | (1) |
| Differential equations, Partial. | (1) |
| Digital computer simulation. | (3) |
| Dishwashing. | (1) |
| Dishwashing machines. | (1) |
| Dissertations, Academic Bibliography. | (1) |
| Diuron. | (1) |
| Dodder. | (1) |
| Domestic animals. | (2) |
| Domestic animals Developing countries Statistics. | (1) |
| Domestic animals Diseases United States. | (1) |
| Domestic animals Parasites. | (2) |
| Douglas fir. | (1) |
| Douglas fir beetle Oregon. | (1) |
| Douglas fir beetle Washington (State) | (1) |
| Douglas fir Cascade Range. | (1) |
| Douglas fir Diseases and pests California. | (1) |
| Douglas fir Diseases and pests Oregon. | (2) |
| Douglas fir Diseases and pests Washington (State) | (1) |
| Douglas fir Montana. | (1) |
| Douglas fir Oregon. | (1) |
| Douglas fir Seeds Storage. | (1) |
| Douglas-fir tussock moth. | (1) |
| Drainage. | (1) |
| Drainage Bibliography. | (1) |
| Dried beans. | (1) |
| Droughts Northeastern States. | (1) |
| Dry farming. | (1) |
| Dry-rot. | (1) |
| Dwarf mistletoe. | (1) |
| Dwellings Heating and ventilation. | (1) |
| Dwellings Maintenance and repair. | (1) |