Space Camp : the great adventure for NASA hopefuls

 https://welib.org/md5/f7bd4350615d9291911d46c831466107

The statesman's year-book : statistical and historical annual of the states of the world for the year 1988-1989

 https://welib.org/md5/77c9239aacc8e4517dd5dde76a761191

Kosmos 429

  1971-061A

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Kosmos-429, a Zenit 4MK, was launched from Baikonur into a 52 degree orbit and recovered after 13 days. Two days into the mission the perigee was lowered to 180 km; an orbit raise burn was carried out on Jul 31.

Kosmos-429
Date	Time	Event	Orbit
1971 Jul 20	1000:00	Launch by 11A57	KB
	1004	Blok-I burn
	1008	Blok-I sep
	1842		89.04 204 x 249 x 51.8
1971 Jul 21	0505		89.02 204 x 247 x 51.8
	1657		89.06 203 x 252 x 51.8
1971 Jul 22	1430		88.98 202 x 252 x 51.76 (RAE)
		Lower perigee
1971 Jul 23	1326		88.89 181 x 257 x 51.8
	1752		88.90 179 x 260 x 51.8
1971 Jul 24	0500		88.81 179 x 258 x 51.76 (RAE)
1971 Jul 31	0448		88.67 177 x 240 x 51.8
	0610?	Orbit raise
	1043		88.96 185 x 261 x 51.8
1971 Aug 1	2216		88.92 183 x 258 x 51.8
	2330	Engine sep
1971 Aug 2	0410?	Retrofire
	0420?	PO sep
	0426?	Entry
	0442?	Landed

Rich was better : a memoir

https://welib.org/md5/f70dd0789e1a893fce027e60bc9528bf

People: April 11,1994

 https://welib.org/md5/3f5de5ada2daa2a1f1e3a2e0db03c7a0

Journal of the British Interplanetary Society: October 1993

 https://welib.org/md5/23afeb5d8668c057359008bbebf1d1a8