TY  - BOOK
AU  - ELLWOOD, Charles
TI  - How to build and operate your greenhouse: Growing methods hydroponics, nutrient formulas, plants, costs, heating and cooling, introduction to solar heating
U1  - 631.234 
PY  - 1977///
CY  - Tucson
PB  - HP Books
KW  - Greenhouse
KW  - Hydroponicss
ER  -