@book{47447,
	author = {Van Holsteijn, H. M. C.},
	title = {A closed systems for measuremente of photosynthesis, respiration and CO2 compensation points},
	publisher = {Veenman & Zonen,},
	year = {1979},
	series = {Mededelingen Landbouwhogeschool},
	address = {Wageningen :}
}