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	1.	Image from Google Jackets	An investigation into the s/2, d/2 (2x2d/4) tapping system by De Jonge P Material type: Text; Format: print ; Literary form: Not fiction Publication details: Planter 1967 Availability: Not available: RRII Library: Journals (1). Save to lists Add to cart (remove)
	2.	Image from Google Jackets	An investigation into the S/2, d/2(2x2d/4) tapping system by De Jonge P Material type: Text; Format: print ; Literary form: Not fiction Publication details: Planter 1979 Availability: Not available: RRII Library: Journals (1). Save to lists Add to cart (remove)
	3.	Image from Google Jackets	Chemara ethrel stimulation experiments: Preliminary results by De Jonge P Tong Tan Hong Material type: Text; Format: print ; Literary form: Not fiction Publication details: Proceedings of the RRIM Planters Conference, Kuala Lumpur, 1971; p126-135 Availability: Not available: RRII Library: Journals (1). Save to lists Add to cart (remove)
	4.	Image from Google Jackets	Data from Chemara crown budding experiments by De Jonge P Material type: Text; Format: print ; Literary form: Not fiction Publication details: Planters Bulletin 1967 Availability: Not available: RRII Library: Journals (1). Save to lists Add to cart (remove)
	5.	Image from Google Jackets	Exploitation of Hevea by De Jonge P Material type: Text; Format: print ; Literary form: Not fiction Publication details: Planters Bulletin 1968 Availability: Not available: RRII Library: Journals (1). Save to lists Add to cart (remove)
	6.	Image from Google Jackets	Influence of depth of tapping on yield, growth and bark renewal by De Jonge P Warriar S M Material type: Text; Format: print ; Literary form: Not fiction Publication details: Planters Bulletin 1965 Availability: Not available: RRII Library: Journals (1). Save to lists Add to cart (remove)
	7.	Image from Google Jackets	Intensive tapping of mature rubber by De Jonge P Material type: Text; Format: print ; Literary form: Not fiction Publication details: Proceedings of the Natural Rubber Research Conference, Kuala Lumpur, 1960; p211-223 Availability: Not available: RRII Library: Journals (1). Save to lists Add to cart (remove)
	8.	Image from Google Jackets	Nursery experimentation at Chemara research station by De Jonge P Material type: Text; Format: print ; Literary form: Not fiction Publication details: Planters Bulletin 1967 Availability: Not available: RRII Library: Journals (1). Save to lists Add to cart (remove)
	9.	Image from Google Jackets	Report on Chemara tapping experiments conducted in co-operation with the Rubber Research Institute of Malaya by De Jonge P Material type: Text; Format: print ; Literary form: Not fiction Publication details: Planters Bulletin 1965 Availability: Not available: RRII Library: Journals (1). Save to lists Add to cart (remove)
	10.	Image from Google Jackets	Stimulation of bark renewal of hevea and its effect on yield of latex by De Jonge P Material type: Text; Format: print ; Literary form: Not fiction Publication details: Journal of the Rubber Research Institute of Malaya 1957 Availability: Not available: RRII Library: Journals (1). Save to lists Add to cart (remove)
	11.	Image from Google Jackets	Tapping of young rubber by De Jonge P Material type: Text; Format: print ; Literary form: Not fiction Publication details: Planters Bulletin 1961 Availability: Not available: RRII Library: Journals (1). Save to lists Add to cart (remove)
	12.	Image from Google Jackets	The effect of size of tapping task on the yield per tapper and yield per acre of Hevea by De Jonge P Westgarth D R Material type: Text; Format: print ; Literary form: Not fiction Publication details: Journal of the Rubber Research Institute of Malaya 1962 Availability: Not available: RRII Library: Journals (1). Save to lists Add to cart (remove)

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